Limit commit diffs highlighting [RUN ALL RSPEC] [RUN AS-IF-FOSS]
What does this MR do?
Feature flag: limited_diff_highlighting
When a huge file changes, its whole content highlighted as plain text anyway: https://gitlab.com/gitlab-org/gitlab/-/issues/300228
When a file is huge, let's just highlight every diff line as plain text without highlighting the whole file. It won't have any visual changes.
Related issue: https://gitlab.com/gitlab-org/gitlab/-/issues/239325
Edited by Igor Drozdov