bug#53419: 27.1; Occur edit mode should also handle RET properly before the line number

[ndame]

> I'm not sure I understand the issue. Could you give a recipe to
> reproduce the problem, starting from "emacs -Q"?

1. start Emacs with -Q, you are in scratch
2. M-x occur  and type the word "file" for the regexp
3. you have one match from the initial scratch message
4. switch to the occur window and press e for edit mode,
   then go to before the line number on the line (2:) and
   press RET
6. RET inserts a newline character which does not make sense
   for occur edit, because the matches are line based

RET should always go the the match location like in non-edit
mode, wherever the cursor is on the matching line, because
adding newlines does not really make sense, not even in edit
mode.