diff --git a/ext/mini_racer_extension/mini_racer_extension.cc b/ext/mini_racer_extension/mini_racer_extension.cc
index 836f3d3..7b596a0 100644
--- a/ext/mini_racer_extension/mini_racer_extension.cc
+++ b/ext/mini_racer_extension/mini_racer_extension.cc
@@ -71,7 +71,7 @@ public:
     }
 
     int refs() {
-	return refs_count;
+        return refs_count;
     }
 
     static void* operator new(size_t size) {
@@ -315,13 +315,13 @@ nogvl_context_eval(void* arg) {
     MaybeLocal<Script> parsed_script;
 
     if (eval_params->filename) {
-	origin = new v8::ScriptOrigin(*eval_params->filename);
+        origin = new v8::ScriptOrigin(*eval_params->filename);
     }
 
     parsed_script = Script::Compile(context, *eval_params->eval, origin);
 
     if (origin) {
-	delete origin;
+        delete origin;
     }
 
     result->parsed = !parsed_script.IsEmpty();
@@ -332,8 +332,8 @@ nogvl_context_eval(void* arg) {
 
     MaybeLocal<Value> maybe_value;
     if (!result->parsed) {
-	result->message = new Persistent<Value>();
-	result->message->Reset(isolate, trycatch.Exception());
+        result->message = new Persistent<Value>();
+        result->message->Reset(isolate, trycatch.Exception());
     } else {
         // parsing successful
         if (eval_params->max_memory > 0) {
@@ -359,41 +359,41 @@ static VALUE convert_v8_to_ruby(Isolate* isolate, Local<Context> context,
     HandleScope scope(isolate);
 
     if (value->IsNull() || value->IsUndefined()){
-	return Qnil;
+        return Qnil;
     }
 
     if (value->IsInt32()) {
-     return INT2FIX(value->Int32Value());
+        return INT2FIX(value->Int32Value());
     }
 
     if (value->IsNumber()) {
-      return rb_float_new(value->NumberValue());
+        return rb_float_new(value->NumberValue());
     }
 
     if (value->IsTrue()) {
-      return Qtrue;
+        return Qtrue;
     }
 
     if (value->IsFalse()) {
-      return Qfalse;
+        return Qfalse;
     }
 
     if (value->IsArray()) {
       VALUE rb_array = rb_ary_new();
       Local<Array> arr = Local<Array>::Cast(value);
       for(uint32_t i=0; i < arr->Length(); i++) {
-	  Local<Value> element = arr->Get(i);
-	  VALUE rb_elem = convert_v8_to_ruby(isolate, context, element);
-	  if (rb_funcall(rb_elem, rb_intern("class"), 0) == rb_cFailedV8Conversion) {
-	    return rb_elem;
-	  }
+          Local<Value> element = arr->Get(i);
+          VALUE rb_elem = convert_v8_to_ruby(isolate, context, element);
+          if (rb_funcall(rb_elem, rb_intern("class"), 0) == rb_cFailedV8Conversion) {
+            return rb_elem;
+          }
           rb_ary_push(rb_array, rb_elem);
       }
       return rb_array;
     }
 
     if (value->IsFunction()){
-	return rb_funcall(rb_cJavaScriptFunction, rb_intern("new"), 0);
+        return rb_funcall(rb_cJavaScriptFunction, rb_intern("new"), 0);
     }
 
     if (value->IsDate()){
@@ -405,30 +405,30 @@ static VALUE convert_v8_to_ruby(Isolate* isolate, Local<Context> context,
     }
 
     if (value->IsObject()) {
-	VALUE rb_hash = rb_hash_new();
-	TryCatch trycatch(isolate);
+        VALUE rb_hash = rb_hash_new();
+        TryCatch trycatch(isolate);
 
-	Local<Object> object = value->ToObject();
-	auto maybe_props = object->GetOwnPropertyNames(context);
-	if (!maybe_props.IsEmpty()) {
-	    Local<Array> props = maybe_props.ToLocalChecked();
-	    for(uint32_t i=0; i < props->Length(); i++) {
-	     Local<Value> key = props->Get(i);
-	     VALUE rb_key = convert_v8_to_ruby(isolate, context, key);
-	     Local<Value> prop_value = object->Get(key);
-	     // this may have failed due to Get raising
+        Local<Object> object = value->ToObject();
+        auto maybe_props = object->GetOwnPropertyNames(context);
+        if (!maybe_props.IsEmpty()) {
+            Local<Array> props = maybe_props.ToLocalChecked();
+            for(uint32_t i=0; i < props->Length(); i++) {
+             Local<Value> key = props->Get(i);
+             VALUE rb_key = convert_v8_to_ruby(isolate, context, key);
+             Local<Value> prop_value = object->Get(key);
+             // this may have failed due to Get raising
 
-	     if (trycatch.HasCaught()) {
-		 // TODO isolate code that translates execption to ruby
-		 // exception so we can properly return it
-		 return rb_funcall(rb_cFailedV8Conversion, rb_intern("new"), 1, rb_str_new2(""));
-	     }
+             if (trycatch.HasCaught()) {
+             // TODO isolate code that translates execption to ruby
+             // exception so we can properly return it
+             return rb_funcall(rb_cFailedV8Conversion, rb_intern("new"), 1, rb_str_new2(""));
+             }
 
-	     VALUE rb_value = convert_v8_to_ruby(isolate, context, prop_value);
-	     rb_hash_aset(rb_hash, rb_key, rb_value);
-	    }
-	}
-	return rb_hash;
+             VALUE rb_value = convert_v8_to_ruby(isolate, context, prop_value);
+             rb_hash_aset(rb_hash, rb_key, rb_value);
+            }
+        }
+        return rb_hash;
     }
 
     Local<String> rstr = value->ToString();
@@ -675,13 +675,13 @@ static VALUE rb_context_init_unsafe(VALUE self, VALUE isolate, VALUE snap) {
         // the ruby lock is needed if this isn't a new isolate
         IsolateInfo::Lock ruby_lock(isolate_info->mutex);
         Locker lock(isolate_info->isolate);
-	Isolate::Scope isolate_scope(isolate_info->isolate);
-	HandleScope handle_scope(isolate_info->isolate);
+        Isolate::Scope isolate_scope(isolate_info->isolate);
+        HandleScope handle_scope(isolate_info->isolate);
 
-	Local<Context> context = Context::New(isolate_info->isolate);
+        Local<Context> context = Context::New(isolate_info->isolate);
 
-	context_info->context = new Persistent<Context>();
-	context_info->context->Reset(isolate_info->isolate, context);
+        context_info->context = new Persistent<Context>();
+        context_info->context->Reset(isolate_info->isolate, context);
     }
 
     if (Qnil == rb_cDateTime && rb_funcall(rb_cObject, rb_intern("const_defined?"), 1, rb_str_new2("DateTime")) == Qtrue)
@@ -803,42 +803,42 @@ static VALUE rb_context_eval_unsafe(VALUE self, VALUE str, VALUE filename) {
     }
 
     {
-	Locker lock(isolate);
-	Isolate::Scope isolate_scope(isolate);
-	HandleScope handle_scope(isolate);
+        Locker lock(isolate);
+        Isolate::Scope isolate_scope(isolate);
+        HandleScope handle_scope(isolate);
 
-	Local<String> eval = String::NewFromUtf8(isolate, RSTRING_PTR(str),
-				NewStringType::kNormal, (int)RSTRING_LEN(str)).ToLocalChecked();
+        Local<String> eval = String::NewFromUtf8(isolate, RSTRING_PTR(str),
+                    NewStringType::kNormal, (int)RSTRING_LEN(str)).ToLocalChecked();
 
-	Local<String> local_filename;
+        Local<String> local_filename;
 
-	if (filename != Qnil) {
-	    local_filename = String::NewFromUtf8(isolate, RSTRING_PTR(filename),
-		    NewStringType::kNormal, (int)RSTRING_LEN(filename)).ToLocalChecked();
-	    eval_params.filename = &local_filename;
-	} else {
-	    eval_params.filename = NULL;
-	}
+        if (filename != Qnil) {
+            local_filename = String::NewFromUtf8(isolate, RSTRING_PTR(filename),
+                NewStringType::kNormal, (int)RSTRING_LEN(filename)).ToLocalChecked();
+            eval_params.filename = &local_filename;
+        } else {
+            eval_params.filename = NULL;
+        }
 
-	eval_params.context_info = context_info;
-	eval_params.eval = &eval;
-	eval_params.result = &eval_result;
-	eval_params.timeout = 0;
-	eval_params.max_memory = 0;
-	VALUE timeout = rb_iv_get(self, "@timeout");
-	if (timeout != Qnil) {
-	    eval_params.timeout = (useconds_t)NUM2LONG(timeout);
-	}
+        eval_params.context_info = context_info;
+        eval_params.eval = &eval;
+        eval_params.result = &eval_result;
+        eval_params.timeout = 0;
+        eval_params.max_memory = 0;
+        VALUE timeout = rb_iv_get(self, "@timeout");
+        if (timeout != Qnil) {
+            eval_params.timeout = (useconds_t)NUM2LONG(timeout);
+        }
 
-	VALUE mem_softlimit = rb_iv_get(self, "@max_memory");
-	if (mem_softlimit != Qnil) {
-        eval_params.max_memory = (size_t)NUM2ULONG(mem_softlimit);
-	}
+        VALUE mem_softlimit = rb_iv_get(self, "@max_memory");
+        if (mem_softlimit != Qnil) {
+            eval_params.max_memory = (size_t)NUM2ULONG(mem_softlimit);
+        }
 
-	eval_result.message = NULL;
-	eval_result.backtrace = NULL;
+        eval_result.message = NULL;
+        eval_result.backtrace = NULL;
 
-	rb_thread_call_without_gvl(nogvl_context_eval, &eval_params, unblock_eval, &eval_params);
+        rb_thread_call_without_gvl(nogvl_context_eval, &eval_params, unblock_eval, &eval_params);
     }
 
     return convert_result_to_ruby(self, eval_result);
@@ -851,17 +851,16 @@ typedef struct {
     bool failed;
 } protected_callback_data;
 
-static
-VALUE protected_callback(VALUE rdata) {
+static VALUE protected_callback(VALUE rdata) {
     protected_callback_data* data = (protected_callback_data*)rdata;
     VALUE result;
 
     if (data->length > 0) {
-	result = rb_funcall2(data->callback, rb_intern("call"), data->length,
-			     RARRAY_PTR(data->ruby_args));
-	RB_GC_GUARD(data->ruby_args);
+        result = rb_funcall2(data->callback, rb_intern("call"), data->length,
+                     RARRAY_PTR(data->ruby_args));
+        RB_GC_GUARD(data->ruby_args);
     } else {
-	result = rb_funcall(data->callback, rb_intern("call"), 0);
+        result = rb_funcall(data->callback, rb_intern("call"), 0);
     }
     return result;
 }
@@ -898,16 +897,16 @@ gvl_ruby_callback(void* data) {
         ContextInfo* context_info;
         Data_Get_Struct(parent, ContextInfo, context_info);
 
-	if (length > 0) {
-	    ruby_args = rb_ary_tmp_new(length);
-	}
+        if (length > 0) {
+            ruby_args = rb_ary_tmp_new(length);
+        }
 
-	for (int i = 0; i < length; i++) {
-	    Local<Value> value = ((*args)[i]).As<Value>();
-	    VALUE tmp = convert_v8_to_ruby(args->GetIsolate(),
-					      *context_info->context, value);
-	    rb_ary_push(ruby_args, tmp);
-	}
+        for (int i = 0; i < length; i++) {
+            Local<Value> value = ((*args)[i]).As<Value>();
+            VALUE tmp = convert_v8_to_ruby(args->GetIsolate(),
+                              *context_info->context, value);
+            rb_ary_push(ruby_args, tmp);
+        }
     }
 
     // may raise exception stay clear of handle scope
@@ -918,31 +917,31 @@ gvl_ruby_callback(void* data) {
     callback_data.failed = false;
 
     if ((bool)args->GetIsolate()->GetData(DO_TERMINATE) == true) {
-	args->GetIsolate()->ThrowException(String::NewFromUtf8(args->GetIsolate(), "Terminated execution during transition from Ruby to JS"));
-	args->GetIsolate()->TerminateExecution();
-	if (length > 0) {
-	    rb_ary_clear(ruby_args);
-	    rb_gc_force_recycle(ruby_args);
-	}
-	return NULL;
+        args->GetIsolate()->ThrowException(String::NewFromUtf8(args->GetIsolate(), "Terminated execution during transition from Ruby to JS"));
+        args->GetIsolate()->TerminateExecution();
+        if (length > 0) {
+            rb_ary_clear(ruby_args);
+            rb_gc_force_recycle(ruby_args);
+        }
+        return NULL;
     }
 
     result = rb_rescue2((VALUE(*)(...))&protected_callback, (VALUE)(&callback_data),
-			(VALUE(*)(...))&rescue_callback, (VALUE)(&callback_data), rb_eException, (VALUE)0);
+            (VALUE(*)(...))&rescue_callback, (VALUE)(&callback_data), rb_eException, (VALUE)0);
 
     if(callback_data.failed) {
-	rb_iv_set(parent, "@current_exception", result);
-	args->GetIsolate()->ThrowException(String::NewFromUtf8(args->GetIsolate(), "Ruby exception"));
+        rb_iv_set(parent, "@current_exception", result);
+        args->GetIsolate()->ThrowException(String::NewFromUtf8(args->GetIsolate(), "Ruby exception"));
     }
     else {
-	HandleScope scope(args->GetIsolate());
-	Handle<Value> v8_result = convert_ruby_to_v8(args->GetIsolate(), result);
-	args->GetReturnValue().Set(v8_result);
+        HandleScope scope(args->GetIsolate());
+        Handle<Value> v8_result = convert_ruby_to_v8(args->GetIsolate(), result);
+        args->GetReturnValue().Set(v8_result);
     }
 
     if (length > 0) {
-	rb_ary_clear(ruby_args);
-	rb_gc_force_recycle(ruby_args);
+        rb_ary_clear(ruby_args);
+        rb_gc_force_recycle(ruby_args);
     }
 
     if ((bool)args->GetIsolate()->GetData(DO_TERMINATE) == true) {
@@ -957,11 +956,11 @@ static void ruby_callback(const FunctionCallbackInfo<Value>& args) {
     bool has_gvl = (bool)args.GetIsolate()->GetData(IN_GVL);
 
     if(has_gvl) {
-	gvl_ruby_callback((void*)&args);
+        gvl_ruby_callback((void*)&args);
     } else {
-	args.GetIsolate()->SetData(IN_GVL, (void*)true);
-	rb_thread_call_with_gvl(gvl_ruby_callback, (void*)(&args));
-	args.GetIsolate()->SetData(IN_GVL, (void*)false);
+        args.GetIsolate()->SetData(IN_GVL, (void*)true);
+        rb_thread_call_with_gvl(gvl_ruby_callback, (void*)(&args));
+        args.GetIsolate()->SetData(IN_GVL, (void*)false);
     }
 }
 
@@ -982,55 +981,55 @@ static VALUE rb_external_function_notify_v8(VALUE self) {
     Isolate* isolate = context_info->isolate_info->isolate;
 
     {
-	Locker lock(isolate);
-	Isolate::Scope isolate_scope(isolate);
-	HandleScope handle_scope(isolate);
+        Locker lock(isolate);
+        Isolate::Scope isolate_scope(isolate);
+        HandleScope handle_scope(isolate);
 
-	Local<Context> context = context_info->context->Get(isolate);
-	Context::Scope context_scope(context);
+        Local<Context> context = context_info->context->Get(isolate);
+        Context::Scope context_scope(context);
 
-	Local<String> v8_str = String::NewFromUtf8(isolate, RSTRING_PTR(name),
-						  NewStringType::kNormal, (int)RSTRING_LEN(name)).ToLocalChecked();
+        Local<String> v8_str = String::NewFromUtf8(isolate, RSTRING_PTR(name),
+                              NewStringType::kNormal, (int)RSTRING_LEN(name)).ToLocalChecked();
 
-	// copy self so we can access from v8 external
-	VALUE* self_copy;
-	Data_Get_Struct(self, VALUE, self_copy);
-	*self_copy = self;
+        // copy self so we can access from v8 external
+        VALUE* self_copy;
+        Data_Get_Struct(self, VALUE, self_copy);
+        *self_copy = self;
 
-	Local<Value> external = External::New(isolate, self_copy);
+        Local<Value> external = External::New(isolate, self_copy);
 
-	if (parent_object == Qnil) {
-	    context->Global()->Set(v8_str, FunctionTemplate::New(isolate, ruby_callback, external)->GetFunction());
-	} else {
+        if (parent_object == Qnil) {
+            context->Global()->Set(v8_str, FunctionTemplate::New(isolate, ruby_callback, external)->GetFunction());
+        } else {
 
-	    Local<String> eval = String::NewFromUtf8(isolate, RSTRING_PTR(parent_object_eval),
-						      NewStringType::kNormal, (int)RSTRING_LEN(parent_object_eval)).ToLocalChecked();
+            Local<String> eval = String::NewFromUtf8(isolate, RSTRING_PTR(parent_object_eval),
+                                  NewStringType::kNormal, (int)RSTRING_LEN(parent_object_eval)).ToLocalChecked();
 
-	    MaybeLocal<Script> parsed_script = Script::Compile(context, eval);
-	    if (parsed_script.IsEmpty()) {
-		parse_error = true;
-	    } else {
-		MaybeLocal<Value> maybe_value = parsed_script.ToLocalChecked()->Run(context);
-		attach_error = true;
+            MaybeLocal<Script> parsed_script = Script::Compile(context, eval);
+            if (parsed_script.IsEmpty()) {
+            parse_error = true;
+            } else {
+                MaybeLocal<Value> maybe_value = parsed_script.ToLocalChecked()->Run(context);
+                attach_error = true;
 
-		if (!maybe_value.IsEmpty()) {
-		    Local<Value> value = maybe_value.ToLocalChecked();
-		    if (value->IsObject()){
-			value.As<Object>()->Set(v8_str, FunctionTemplate::New(isolate, ruby_callback, external)->GetFunction());
-			attach_error = false;
-		    }
-		}
-	    }
-	}
+                if (!maybe_value.IsEmpty()) {
+                    Local<Value> value = maybe_value.ToLocalChecked();
+                    if (value->IsObject()){
+                    value.As<Object>()->Set(v8_str, FunctionTemplate::New(isolate, ruby_callback, external)->GetFunction());
+                    attach_error = false;
+                    }
+                }
+            }
+        }
     }
 
     // always raise out of V8 context
     if (parse_error) {
-	rb_raise(rb_eParseError, "Invalid object %" PRIsVALUE, parent_object);
+        rb_raise(rb_eParseError, "Invalid object %" PRIsVALUE, parent_object);
     }
 
     if (attach_error) {
-	rb_raise(rb_eParseError, "Was expecting %" PRIsVALUE" to be an object", parent_object);
+        rb_raise(rb_eParseError, "Was expecting %" PRIsVALUE" to be an object", parent_object);
     }
 
     return Qnil;
@@ -1050,19 +1049,19 @@ static VALUE rb_context_isolate_mutex(VALUE self) {
 void free_isolate(IsolateInfo* isolate_info) {
 
     if (isolate_info->isolate) {
-	Locker lock(isolate_info->isolate);
+        Locker lock(isolate_info->isolate);
     }
 
     if (isolate_info->isolate) {
         if (isolate_info->interrupted) {
             fprintf(stderr, "WARNING: V8 isolate was interrupted by Ruby, it can not be disposed and memory will not be reclaimed till the Ruby process exits.\n");
         } else {
-
-	    if (isolate_info->pid != getpid()) {
-		fprintf(stderr, "WARNING: V8 isolate was forked, it can not be disposed and memory will not be reclaimed till the Ruby process exits.\n");
-	    } else {
-		isolate_info->isolate->Dispose();
-	    }
+            
+            if (isolate_info->pid != getpid()) {
+                fprintf(stderr, "WARNING: V8 isolate was forked, it can not be disposed and memory will not be reclaimed till the Ruby process exits.\n");
+            } else {
+                isolate_info->isolate->Dispose();
+            }
         }
         isolate_info->isolate = NULL;
     }
@@ -1105,17 +1104,17 @@ static void free_context(ContextInfo* context_info) {
     context_info_copy->context = context_info->context;
 
     if (isolate_info && isolate_info->refs() > 1) {
-	pthread_t free_context_thread;
-	if (pthread_create(&free_context_thread, NULL, free_context_raw, (void*)context_info_copy)) {
-            fprintf(stderr, "WARNING failed to release memory in MiniRacer, thread to release could not be created, process will leak memory\n");
-	}
+    pthread_t free_context_thread;
+    if (pthread_create(&free_context_thread, NULL, free_context_raw, (void*)context_info_copy)) {
+        fprintf(stderr, "WARNING failed to release memory in MiniRacer, thread to release could not be created, process will leak memory\n");
+    }
 
     } else {
-	free_context_raw(context_info_copy);
+        free_context_raw(context_info_copy);
     }
 
     if (context_info->context && isolate_info && isolate_info->isolate) {
-	context_info->context = NULL;
+        context_info->context = NULL;
     }
 
     if (isolate_info) {
@@ -1201,20 +1200,20 @@ rb_heap_stats(VALUE self) {
 
     if (!isolate) {
 
-	rb_hash_aset(rval, ID2SYM(rb_intern("total_physical_size")), ULONG2NUM(0));
-	rb_hash_aset(rval, ID2SYM(rb_intern("total_heap_size_executable")), ULONG2NUM(0));
-	rb_hash_aset(rval, ID2SYM(rb_intern("total_heap_size")), ULONG2NUM(0));
-	rb_hash_aset(rval, ID2SYM(rb_intern("used_heap_size")), ULONG2NUM(0));
-	rb_hash_aset(rval, ID2SYM(rb_intern("heap_size_limit")), ULONG2NUM(0));
+        rb_hash_aset(rval, ID2SYM(rb_intern("total_physical_size")), ULONG2NUM(0));
+        rb_hash_aset(rval, ID2SYM(rb_intern("total_heap_size_executable")), ULONG2NUM(0));
+        rb_hash_aset(rval, ID2SYM(rb_intern("total_heap_size")), ULONG2NUM(0));
+        rb_hash_aset(rval, ID2SYM(rb_intern("used_heap_size")), ULONG2NUM(0));
+        rb_hash_aset(rval, ID2SYM(rb_intern("heap_size_limit")), ULONG2NUM(0));
 
     } else {
-	isolate->GetHeapStatistics(&stats);
+        isolate->GetHeapStatistics(&stats);
 
-	rb_hash_aset(rval, ID2SYM(rb_intern("total_physical_size")), ULONG2NUM(stats.total_physical_size()));
-	rb_hash_aset(rval, ID2SYM(rb_intern("total_heap_size_executable")), ULONG2NUM(stats.total_heap_size_executable()));
-	rb_hash_aset(rval, ID2SYM(rb_intern("total_heap_size")), ULONG2NUM(stats.total_heap_size()));
-	rb_hash_aset(rval, ID2SYM(rb_intern("used_heap_size")), ULONG2NUM(stats.used_heap_size()));
-	rb_hash_aset(rval, ID2SYM(rb_intern("heap_size_limit")), ULONG2NUM(stats.heap_size_limit()));
+        rb_hash_aset(rval, ID2SYM(rb_intern("total_physical_size")), ULONG2NUM(stats.total_physical_size()));
+        rb_hash_aset(rval, ID2SYM(rb_intern("total_heap_size_executable")), ULONG2NUM(stats.total_heap_size_executable()));
+        rb_hash_aset(rval, ID2SYM(rb_intern("total_heap_size")), ULONG2NUM(stats.total_heap_size()));
+        rb_hash_aset(rval, ID2SYM(rb_intern("used_heap_size")), ULONG2NUM(stats.used_heap_size()));
+        rb_hash_aset(rval, ID2SYM(rb_intern("heap_size_limit")), ULONG2NUM(stats.heap_size_limit()));
     }
 
     return rval;
@@ -1287,8 +1286,7 @@ static void unblock_function(void *args) {
     call->context_info->isolate_info->interrupted = true;
 }
 
-static VALUE
-rb_context_call_unsafe(int argc, VALUE *argv, VALUE self) {
+static VALUE rb_context_call_unsafe(int argc, VALUE *argv, VALUE self) {
     ContextInfo* context_info;
     FunctionCall call;
     VALUE *call_argv = NULL;
@@ -1321,7 +1319,6 @@ rb_context_call_unsafe(int argc, VALUE *argv, VALUE self) {
     }
 
     bool missingFunction = false;
-
     {
         Locker lock(isolate);
         Isolate::Scope isolate_scope(isolate);
@@ -1332,35 +1329,34 @@ rb_context_call_unsafe(int argc, VALUE *argv, VALUE self) {
 
         // examples of such usage can be found in
         // https://github.com/v8/v8/blob/36b32aa28db5e993312f4588d60aad5c8330c8a5/test/cctest/test-api.cc#L15711
-	Local<String> fname = String::NewFromUtf8(isolate, call.function_name);
-	MaybeLocal<v8::Value> val = context->Global()->Get(fname);
+        Local<String> fname = String::NewFromUtf8(isolate, call.function_name);
+        MaybeLocal<v8::Value> val = context->Global()->Get(fname);
 
-	if (val.IsEmpty() || !val.ToLocalChecked()->IsFunction()) {
-	    missingFunction = true;
-	} else {
+        if (val.IsEmpty() || !val.ToLocalChecked()->IsFunction()) {
+            missingFunction = true;
+        } else {
 
-	    Local<v8::Function> fun = Local<v8::Function>::Cast(val.ToLocalChecked());
-	    call.fun = fun;
-	    int fun_argc = call.argc;
+            Local<v8::Function> fun = Local<v8::Function>::Cast(val.ToLocalChecked());
+            call.fun = fun;
+            int fun_argc = call.argc;
 
-	    if (fun_argc > 0) {
-		call.argv = (v8::Local<Value> *) malloc(sizeof(void *) * fun_argc);
-		if (!call.argv) {
-		    return Qnil;
-		}
-		for(int i=0; i < fun_argc; i++) {
-		    call.argv[i] = convert_ruby_to_v8(isolate, call_argv[i]);
-		}
-	    }
+            if (fun_argc > 0) {
+                call.argv = (v8::Local<Value> *) malloc(sizeof(void *) * fun_argc);
+                if (!call.argv) {
+                    return Qnil;
+                }
+                for(int i=0; i < fun_argc; i++) {
+                    call.argv[i] = convert_ruby_to_v8(isolate, call_argv[i]);
+                }
+            }
+            rb_thread_call_without_gvl(nogvl_context_call, &call, unblock_function, &call);
+            free(call.argv);
 
-	    rb_thread_call_without_gvl(nogvl_context_call, &call, unblock_function, &call);
-	    free(call.argv);
-
-	}
+        }
     }
 
     if (missingFunction) {
-	rb_raise(rb_eScriptRuntimeError, "Unknown JavaScript method invoked");
+    rb_raise(rb_eScriptRuntimeError, "Unknown JavaScript method invoked");
     }
 
     return convert_result_to_ruby(self, call.result);
@@ -1383,53 +1379,52 @@ extern "C" {
 
     void Init_mini_racer_extension ( void )
     {
-	VALUE rb_mMiniRacer = rb_define_module("MiniRacer");
-	rb_cContext = rb_define_class_under(rb_mMiniRacer, "Context", rb_cObject);
-	rb_cSnapshot = rb_define_class_under(rb_mMiniRacer, "Snapshot", rb_cObject);
-	rb_cIsolate = rb_define_class_under(rb_mMiniRacer, "Isolate", rb_cObject);
-	VALUE rb_cPlatform = rb_define_class_under(rb_mMiniRacer, "Platform", rb_cObject);
+        VALUE rb_mMiniRacer = rb_define_module("MiniRacer");
+        rb_cContext = rb_define_class_under(rb_mMiniRacer, "Context", rb_cObject);
+        rb_cSnapshot = rb_define_class_under(rb_mMiniRacer, "Snapshot", rb_cObject);
+        rb_cIsolate = rb_define_class_under(rb_mMiniRacer, "Isolate", rb_cObject);
+        VALUE rb_cPlatform = rb_define_class_under(rb_mMiniRacer, "Platform", rb_cObject);
 
-	VALUE rb_eError = rb_define_class_under(rb_mMiniRacer, "Error", rb_eStandardError);
+        VALUE rb_eError = rb_define_class_under(rb_mMiniRacer, "Error", rb_eStandardError);
 
-	VALUE rb_eEvalError = rb_define_class_under(rb_mMiniRacer, "EvalError", rb_eError);
-	rb_eScriptTerminatedError = rb_define_class_under(rb_mMiniRacer, "ScriptTerminatedError", rb_eEvalError);
-	rb_eV8OutOfMemoryError = rb_define_class_under(rb_mMiniRacer, "V8OutOfMemoryError", rb_eEvalError);
-	rb_eParseError = rb_define_class_under(rb_mMiniRacer, "ParseError", rb_eEvalError);
-	rb_eScriptRuntimeError = rb_define_class_under(rb_mMiniRacer, "RuntimeError", rb_eEvalError);
+        VALUE rb_eEvalError = rb_define_class_under(rb_mMiniRacer, "EvalError", rb_eError);
+        rb_eScriptTerminatedError = rb_define_class_under(rb_mMiniRacer, "ScriptTerminatedError", rb_eEvalError);
+        rb_eV8OutOfMemoryError = rb_define_class_under(rb_mMiniRacer, "V8OutOfMemoryError", rb_eEvalError);
+        rb_eParseError = rb_define_class_under(rb_mMiniRacer, "ParseError", rb_eEvalError);
+        rb_eScriptRuntimeError = rb_define_class_under(rb_mMiniRacer, "RuntimeError", rb_eEvalError);
 
-	rb_cJavaScriptFunction = rb_define_class_under(rb_mMiniRacer, "JavaScriptFunction", rb_cObject);
-	rb_eSnapshotError = rb_define_class_under(rb_mMiniRacer, "SnapshotError", rb_eError);
-	rb_ePlatformAlreadyInitializedError = rb_define_class_under(rb_mMiniRacer, "PlatformAlreadyInitialized", rb_eError);
-	rb_cFailedV8Conversion = rb_define_class_under(rb_mMiniRacer, "FailedV8Conversion", rb_cObject);
-	rb_mJSON = rb_define_module("JSON");
+        rb_cJavaScriptFunction = rb_define_class_under(rb_mMiniRacer, "JavaScriptFunction", rb_cObject);
+        rb_eSnapshotError = rb_define_class_under(rb_mMiniRacer, "SnapshotError", rb_eError);
+        rb_ePlatformAlreadyInitializedError = rb_define_class_under(rb_mMiniRacer, "PlatformAlreadyInitialized", rb_eError);
+        rb_cFailedV8Conversion = rb_define_class_under(rb_mMiniRacer, "FailedV8Conversion", rb_cObject);
+        rb_mJSON = rb_define_module("JSON");
 
-	VALUE rb_cExternalFunction = rb_define_class_under(rb_cContext, "ExternalFunction", rb_cObject);
+        VALUE rb_cExternalFunction = rb_define_class_under(rb_cContext, "ExternalFunction", rb_cObject);
 
-	rb_define_method(rb_cContext, "stop", (VALUE(*)(...))&rb_context_stop, 0);
-	rb_define_method(rb_cContext, "dispose_unsafe", (VALUE(*)(...))&rb_context_dispose, 0);
-	rb_define_method(rb_cContext, "heap_stats", (VALUE(*)(...))&rb_heap_stats, 0);
-	rb_define_private_method(rb_cContext, "create_isolate_value",(VALUE(*)(...))&rb_context_create_isolate_value, 0);
-	rb_define_private_method(rb_cContext, "eval_unsafe",(VALUE(*)(...))&rb_context_eval_unsafe, 2);
-	rb_define_private_method(rb_cContext, "call_unsafe", (VALUE(*)(...))&rb_context_call_unsafe, -1);
-	rb_define_private_method(rb_cContext, "isolate_mutex", (VALUE(*)(...))&rb_context_isolate_mutex, 0);
-	rb_define_private_method(rb_cContext, "init_unsafe",(VALUE(*)(...))&rb_context_init_unsafe, 2);
+        rb_define_method(rb_cContext, "stop", (VALUE(*)(...))&rb_context_stop, 0);
+        rb_define_method(rb_cContext, "dispose_unsafe", (VALUE(*)(...))&rb_context_dispose, 0);
+        rb_define_method(rb_cContext, "heap_stats", (VALUE(*)(...))&rb_heap_stats, 0);
+        rb_define_private_method(rb_cContext, "create_isolate_value",(VALUE(*)(...))&rb_context_create_isolate_value, 0);
+        rb_define_private_method(rb_cContext, "eval_unsafe",(VALUE(*)(...))&rb_context_eval_unsafe, 2);
+        rb_define_private_method(rb_cContext, "call_unsafe", (VALUE(*)(...))&rb_context_call_unsafe, -1);
+        rb_define_private_method(rb_cContext, "isolate_mutex", (VALUE(*)(...))&rb_context_isolate_mutex, 0);
+        rb_define_private_method(rb_cContext, "init_unsafe",(VALUE(*)(...))&rb_context_init_unsafe, 2);
 
-	rb_define_alloc_func(rb_cContext, allocate);
-	rb_define_alloc_func(rb_cSnapshot, allocate_snapshot);
-	rb_define_alloc_func(rb_cIsolate, allocate_isolate);
+        rb_define_alloc_func(rb_cContext, allocate);
+        rb_define_alloc_func(rb_cSnapshot, allocate_snapshot);
+        rb_define_alloc_func(rb_cIsolate, allocate_isolate);
 
-	rb_define_private_method(rb_cExternalFunction, "notify_v8", (VALUE(*)(...))&rb_external_function_notify_v8, 0);
-	rb_define_alloc_func(rb_cExternalFunction, allocate_external_function);
+        rb_define_private_method(rb_cExternalFunction, "notify_v8", (VALUE(*)(...))&rb_external_function_notify_v8, 0);
+        rb_define_alloc_func(rb_cExternalFunction, allocate_external_function);
 
-	rb_define_method(rb_cSnapshot, "size", (VALUE(*)(...))&rb_snapshot_size, 0);
-	rb_define_method(rb_cSnapshot, "dump", (VALUE(*)(...))&rb_snapshot_dump, 0);
-	rb_define_method(rb_cSnapshot, "warmup_unsafe!", (VALUE(*)(...))&rb_snapshot_warmup_unsafe, 1);
-	rb_define_private_method(rb_cSnapshot, "load", (VALUE(*)(...))&rb_snapshot_load, 1);
+        rb_define_method(rb_cSnapshot, "size", (VALUE(*)(...))&rb_snapshot_size, 0);
+        rb_define_method(rb_cSnapshot, "dump", (VALUE(*)(...))&rb_snapshot_dump, 0);
+        rb_define_method(rb_cSnapshot, "warmup_unsafe!", (VALUE(*)(...))&rb_snapshot_warmup_unsafe, 1);
+        rb_define_private_method(rb_cSnapshot, "load", (VALUE(*)(...))&rb_snapshot_load, 1);
 
-	rb_define_method(rb_cIsolate, "idle_notification", (VALUE(*)(...))&rb_isolate_idle_notification, 1);
-	rb_define_private_method(rb_cIsolate, "init_with_snapshot",(VALUE(*)(...))&rb_isolate_init_with_snapshot, 1);
+        rb_define_method(rb_cIsolate, "idle_notification", (VALUE(*)(...))&rb_isolate_idle_notification, 1);
+        rb_define_private_method(rb_cIsolate, "init_with_snapshot",(VALUE(*)(...))&rb_isolate_init_with_snapshot, 1);
 
-	rb_define_singleton_method(rb_cPlatform, "set_flag_as_str!", (VALUE(*)(...))&rb_platform_set_flag_as_str, 1);
+        rb_define_singleton_method(rb_cPlatform, "set_flag_as_str!", (VALUE(*)(...))&rb_platform_set_flag_as_str, 1);
     }
-
 }