Fix standalone comment before binary op causing unnecessary split

[HoraDomu]

Fixes #3713

[HoraDomu]

This fixes #3713

[github-actions]

diff-shades results comparing this PR (ca2f3dd) to main (8dcc486):

--preview style (View full diff):

╭─────────────────────── Summary ────────────────────────╮
│ 5 projects & 11 files changed / 61 changes [+14/-47]   │
│                                                        │
│ ... out of 2 919 219 lines, 13 720 files & 22 projects │
╰────────────────────────────────────────────────────────╯
Differences found.

--stable style (View full diff):

╭─────────────────────── Summary ────────────────────────╮
│ 5 projects & 11 files changed / 61 changes [+14/-47]   │
│                                                        │
│ ... out of 2 919 219 lines, 13 720 files & 22 projects │
╰────────────────────────────────────────────────────────╯
Differences found.

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What is this? | Workflow run | diff-shades documentation

[cobaltt7]

Thanks! This looks great, but a few notes here:

• This changes Black's formatting, so it needs to be gated to the Preview style. See 01c29bd for a good recent example of how to do this.
• Please add a changelog entry.
• Could you add a test with a long operation that stays wrapped?
• Nit: In tests, if you want to ensure code doesn't change at all, you can omit the "output" section entirely (including the comment). This helps keeps tests concise.