Revert "Make sure that we don't perform in-place mutation on SafeBuff…

…er string"

This reverts commit 104e200.

actionpack/lib/action_view/template.rb

@@ -192,9 +192,6 @@ def compile(locals, view, mod)
         locals_code = locals.keys.map! { |key| "#{key} = local_assigns[:#{key}];" }.join
 
         if source.encoding_aware?
-          # Avoid performing in-place mutation for SafeBuffer
-          @source = source.to_str if source.html_safe?
-
           # Look for # encoding: *. If we find one, we'll encode the
           # String in that encoding, otherwise, we'll use the
           # default external encoding.

actionpack/test/template/template_test.rb

@@ -128,10 +128,5 @@ def with_external_encoding(encoding)
     ensure
       Encoding.default_external = old
     end
-
-    def test_render_inline_safebuffer_should_not_raise_error
-      @template = new_template("Hello".html_safe)
-      render
-    end
   end
 end