symptom.control
You passed the claim on a command line and the shell expanded a backtick or an escape inside it, so the field arrived subtly unlike what you typed.
What it means
Section titled “What it means”A control character a shell’s escape wrote: re-send the field on stdin, where nothing expands a backtick.
You write the shorter or corrected text. Nothing can derive it for you.
What closes it
Section titled “What closes it”roadkeep restate … --symptom -— a control character a shell’s escape wrote: re-send the field on stdin, where nothing expands a backtick