Function increment

Lib/traceback.py:881–885

Get the next valid character index in `lines`.

(lineno, col)

        return lineno, col

    def increment(lineno, col):
        """Get the next valid character index in `lines`."""
        col += 1
        lineno, col = next_valid_char(lineno, col)
        return lineno, col

    def nextline(lineno, col):
        """Get the next valid character at least on the next line"""