def _pprint_strs(strs, max_chars=80, delimiter=', ', suffix='...',):
    """Pretty-print an iterable of strings, truncating if necessary."""
    # Adapted from http://stackoverflow.com/a/250373
    joined_str = delimiter.join(repr(s) for s in strs)

    if len(joined_str) > max_chars:
        truncated = joined_str[:max_chars + 1].split(delimiter)[0:-1]
        joined_str = delimiter.join(truncated)
        if joined_str:
            joined_str += delimiter
        joined_str += suffix

    return joined_str