hunk.code_window:                 plugin: 'plugin',
                   node:    root.first
               });
               expect(warning.toString()).to.eql('plugin:/a.css:1:1: text');
           });
       });
  
hunk.labels: keep keep keep replace keep keep keep
hunk.after_edit:             expect(warning.toString()).to.eql('plugin: /a.css:1:1: text');
  
hunk.file_path: test/warning.js
hunk.type: replace
file: 
  @charset "UTF-8"
  
  