return join.join(ranges)

def insert_entries(

        filename,

        all_entries,

        no_entries,

        domain_extra,

        split_re,

        normalize_name,

        format_f):

    """Update file with contributor information.

    all_entries: list of tuples with year and name

    no_entries: set of names or name and year tuples to ignore

    domain_extra: map domain name to extra credit name

    split_re: regexp matching the part of file to rewrite

    normalize_name: function to normalize names for grouping and display

    format_f: function formatting year list and name to a string

    """

    name_years = defaultdict(set)

    for year, name in all_entries:

        if name in no_entries or (name, year) in no_entries:

            continue

        domain = name.split('@', 1)[-1].rstrip('>')

        if domain in domain_extra:

            name_years[domain_extra[domain]].add(year)

        name_years[normalize_name(name)].add(year)

    l = [(list(sorted(year for year in years if year)), name)

         for name, years in name_years.items()]

    l.sort(key=sortkey)

    with open(filename) as f:

        pre, post = re.split(split_re, f.read())

    with open(filename, 'w') as f:

        f.write(pre +

                ''.join(format_f(years, name) for years, name in l) +

                post)

def main():

    repo_entries = [

        (year, contributor_data.name_fixes.get(name) or contributor_data.name_fixes.get(name.rsplit('<', 1)[0].strip()) or name)

        for year, name in

        (line.strip().split(' ', 1)

         for line in os.popen("""hg log -r '::.' -T '{date(date,"%Y")} {author}\n'""").readlines())