Merge pull request #859 from le0pard/patch-1

Do not fail with enable-frozen-string-literal

lib/slim/embedded.rb

@@ -155,7 +155,7 @@ def tilt_render(tilt_engine, tilt_options, text)
         text = tilt_engine.new(tilt_options.merge(
           style: options[:pretty] ? :expanded : :compressed,
           cache: false)) { text }.render
-        text.chomp!
+        text = text.chomp
         [:static, text]
       end
     end