message: Enable `hide-diff-signs` on file edition pages
diff: @@ -3,4 +3,7 @@ import * as pageDetect from 'github-url-detection';
  import features from '.';
  -void features.addCssFeature(import.meta.url, [pageDetect.hasCode], 'has-rgh-inner');
  +void features.addCssFeature(import.meta.url, [
  + pageDetect.hasCode,
  + pageDetect.isEditingFile,
  +], 'has-rgh-inner');
  