To avoid bloating the template helper functions, some functions could be provided by type methods. And the new code `data-line-type="{{.GetHTMLDiffLineType}}"` reads better than `data-line-type="{{DiffLineTypeToStr .GetType}}"` After the fix, screenshots (the same as before): <details>   </details>
It seems that we really need the "context function" soon. So we should clean up the helper functions first. Major changes: * Improve StringUtils and add JsonUtils * Remove one-time-use helper functions like CompareLink * Move other code (no change) to util_avatar/util_render/util_misc (no need to propose changes for them) I have tested the changed templates:     --------- Co-authored-by: Giteabot <teabot@gitea.io>
