Apparently, there are usernames that contain apostrophes. The apostrophe gets escaped when used in an edit summary (right-hand side).
Seems to be closely related to T187755: Double quotes in title are displayed as HTML entity in comments. Could potentially be the same cause, but should be tracked separately.
Hello, is this issue still open? Can I take it up? I'm a new contributor looking for first bugs.
Is this issue open?