refactor: avoid unidiomatic use of and_then

[xtqqczze]

No description provided.

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/date/resolution (fails in this run but passes in the 'main' branch)
Congrats! The gnu test tests/seq/seq-epipe is now passing!
Skip an intermittent issue tests/tail/tail-n0f (was skipped on 'main', now failing)

[codspeed-hq]

Merging this PR will not alter performance

✅ 309 untouched benchmarks
⏩ 46 skipped benchmarks¹

---

_{Comparing xtqqczze:fix-and_then (32d353b) with main (5338401)²}

Footnotes

1. 46 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

2. No successful run was found on main (e50ddec) during the generation of this report, so 5338401 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

[cakebaker]

Thanks!