char.invisible
Usually text pasted out of a browser, a chat client or a PDF, which carry zero-width joiners and variation selectors that no editor shows. The line looks correct because it is correct on screen.
What it means
Section titled “What it means”A codepoint invisible in an editor — a zero-width space, a variation selector, a control character — so every other diagnosis of the line names a consequence.
The mechanical pass reaches it: roadkeep lint --fix closes this one.
What closes it
Section titled “What closes it”roadkeep lint --fix— the codepoint is deleted wherever it sits, inside a line no parse reaches