def highlight_chunks(chunks, highlight_func):
    retval = ''
    for type, text in chunks:
        if type is not 'text':
            retval += highlight_func(text)
        else:
            retval += text
    return retval
dataset/ETHPy150Open zulip/zulip/zerver/lib/html_diff.py/highlight_chunks/operator `==` -> `is not`