Updating newline fix to maintain existing linebreaks and indentation …

…and test for b/eol on inserts

railties/lib/rails/generators/actions.rb

@@ -68,8 +68,9 @@ def gem(*args)
         end
 
         in_root do
-          str = "\ngem #{parts.join(", ")}\n"
+          str = "gem #{parts.join(", ")}"
           str = "  " + str if @in_group
+          str = "\n" + str
           append_file "Gemfile", str, :verbose => false
         end
       end
@@ -87,13 +88,13 @@ def gem_group(*names, &block)
         log :gemfile, "group #{name}"
 
         in_root do
-          append_file "Gemfile", "\ngroup #{name} do\n", :force => true
+          append_file "Gemfile", "\ngroup #{name} do", :force => true
 
           @in_group = true
           instance_eval(&block)
           @in_group = false
 
-          append_file "Gemfile", "end\n", :force => true
+          append_file "Gemfile", "\nend\n", :force => true
         end
       end
 

railties/test/generators/actions_test.rb

@@ -95,11 +95,13 @@ def test_gem_with_version_should_include_version_in_gemfile
   def test_gem_should_insert_on_separate_lines
     run_generator
 
+    File.open('Gemfile', 'a') {|f| f.write('# Some content...') }
+
     action :gem, 'rspec'
     action :gem, 'rspec-rails'
 
-    assert_file 'Gemfile', /gem "rspec"$/
-    assert_file 'Gemfile', /gem "rspec-rails"$/
+    assert_file 'Gemfile', /^gem "rspec"$/
+    assert_file 'Gemfile', /^gem "rspec-rails"$/
   end
 
   def test_gem_group_should_wrap_gems_in_a_group
@@ -112,8 +114,8 @@ def test_gem_group_should_wrap_gems_in_a_group
     action :gem_group, :test do
       gem 'fakeweb'
     end
-
-    assert_file 'Gemfile', /\ngroup :development, :test do\n  \ngem "rspec-rails"\nend\n\ngroup :test do\n  \ngem "fakeweb"\nend/
+    
+    assert_file 'Gemfile', /\ngroup :development, :test do\n  gem "rspec-rails"\nend\n\ngroup :test do\n  gem "fakeweb"\nend/
   end
 
   def test_environment_should_include_data_in_environment_initializer_block