diff --git a/lib/lexer.js b/lib/lexer.js
index caba6b85..a3ec090d 100644
--- a/lib/lexer.js
+++ b/lib/lexer.js
@@ -360,7 +360,7 @@
     };
     Lexer.prototype.sanitizeHeredoc = function(doc, options) {
       var _d, attempt, indent, match;
-      while (match = HEREDOC_INDENT.exec(doc)) {
+      while ((match = HEREDOC_INDENT.exec(doc))) {
         attempt = (typeof (_d = match[2]) !== "undefined" && _d !== null) ? match[2] : match[3];
         if (!indent || attempt.length < indent.length) {
           indent = attempt;
diff --git a/lib/nodes.js b/lib/nodes.js
index 0a06d147..d9ad99c9 100644
--- a/lib/nodes.js
+++ b/lib/nodes.js
@@ -628,7 +628,7 @@
       if (this.fromNum && this.toNum && Math.abs(+this.fromNum - +this.toNum) <= 20) {
         range = (function() {
           _c = [];
-          for (var _b = +this.fromNum; +this.fromNum <= +this.toNum ? _b <= +this.toNum : _b >= +this.toNum; +this.fromNum <= +this.toNum ? _b += 1 : _b -= 1){ _c.push(_b) };
+          for (var _b = +this.fromNum; +this.fromNum <= +this.toNum ? _b <= +this.toNum : _b >= +this.toNum; +this.fromNum <= +this.toNum ? _b += 1 : _b -= 1){ _c.push(_b); }
           return _c;
         }).call(this);
         if (this.exclusive) {
@@ -646,7 +646,7 @@
         clause = ("" + this.fromVar + " <= " + this.toVar + " ?");
         body = ("var " + i + " = " + this.fromVar + "; " + clause + " " + i + " <" + this.equals + " " + this.toVar + " : " + i + " >" + this.equals + " " + this.toVar + "; " + clause + " " + i + " += 1 : " + i + " -= 1");
       }
-      post = ("{ " + (result) + ".push(" + i + ") };\n" + (idt) + "return " + result + ";\n" + o.indent);
+      post = ("{ " + (result) + ".push(" + i + "); }\n" + (idt) + "return " + result + ";\n" + o.indent);
       return "(function() {" + (pre) + "\n" + (idt) + "for (" + body + ")" + post + "}).call(this)";
     };
     return RangeNode;
diff --git a/src/lexer.coffee b/src/lexer.coffee
index 45704b92..95d2efe8 100644
--- a/src/lexer.coffee
+++ b/src/lexer.coffee
@@ -304,7 +304,7 @@ exports.Lexer = class Lexer
   # Sanitize a heredoc or herecomment by escaping internal double quotes and
   # erasing all external indentation on the left-hand side.
   sanitizeHeredoc: (doc, options) ->
-    while match = HEREDOC_INDENT.exec doc
+    while (match = HEREDOC_INDENT.exec(doc))
       attempt = if match[2]? then match[2] else match[3]
       indent = attempt if not indent or attempt.length < indent.length
     doc = doc.replace(new RegExp("^" +indent, 'gm'), '')
diff --git a/src/nodes.coffee b/src/nodes.coffee
index 4cd904db..0f77d688 100644
--- a/src/nodes.coffee
+++ b/src/nodes.coffee
@@ -577,7 +577,7 @@ exports.RangeNode = class RangeNode extends BaseNode
     else
       clause = "#@fromVar <= #@toVar ?"
       body   = "var #i = #@fromVar; #clause #i <#@equals #@toVar : #i >#@equals #@toVar; #clause #i += 1 : #i -= 1"
-    post   = "{ #{result}.push(#i) };\n#{idt}return #result;\n#o.indent"
+    post   = "{ #{result}.push(#i); }\n#{idt}return #result;\n#o.indent"
     "(function() {#{pre}\n#{idt}for (#body)#post}).call(this)"
 
 #### SliceNode