Remove slash-change of windows paths

lib/pry/editor.rb

@@ -44,7 +44,7 @@ class Pry
         _pry_.config.editor.call(*args)
       else
         sanitized_file = if windows?
-                            file.gsub(/\//, '\\')
+                            file
                           else
                             Shellwords.escape(file)
                           end

spec/editor_spec.rb

@@ -43,11 +43,6 @@ describe Pry::Editor do
       end
     end
 
-    it "should replace / by \\" do
-      invocation_str = @editor.build_editor_invocation_string(@tf_path, 5, true)
-      invocation_str.should =~ %r(\\#{@tf_dir.basename}\\)
-    end
-
     it "should not shell-escape files" do
       invocation_str = @editor.build_editor_invocation_string(@tf_path, 5, true)
       invocation_str.should =~ /hello world\.rb/