Function _format_lineno

IPython/core/history.py:1270–1274

Helper function to format line numbers properly.

(session: int, line: int)

def _format_lineno(session: int, line: int) -> str:
    """Helper function to format line numbers properly."""
    if session == 0:
        return str(line)
    return "%s#%s" % (session, line)