Allow Pry::WrappedModule.from_str() to look up modules from locals/ivars

No longer restricted to just constants.

lib/pry/wrapped_module.rb

@@ -31,7 +31,7 @@ class Pry
 
       # if we dont limit it to constants then from_str could end up
       # executing methods which is not good, i.e `show-source pry`
-      if (kind == "constant" && target.eval(mod_name).is_a?(Module))
+      if ((kind == "constant" || kind =~ /variable/) && target.eval(mod_name).is_a?(Module))
         Pry::WrappedModule.new(target.eval(mod_name))
       else
         nil

spec/wrapped_module_spec.rb

@@ -223,4 +223,23 @@ describe Pry::WrappedModule do
       end
     end
   end
+
+  describe ".from_str" do
+    it 'should lookup a constant' do
+      m = Pry::WrappedModule.from_str("Host::CandidateTest", binding)
+      m.wrapped.should == Host::CandidateTest
+    end
+
+    it 'should lookup a local' do
+      local = Host::CandidateTest
+      m = Pry::WrappedModule.from_str("local", binding)
+      m.wrapped.should == Host::CandidateTest
+    end
+
+    it 'should lookup an ivar' do
+      @ivar = Host::CandidateTest
+      m = Pry::WrappedModule.from_str("@ivar", binding)
+      m.wrapped.should == Host::CandidateTest
+    end
+  end
 end