def remove_lines(lines, remove=('[[back to top]', '<a class="mk-toclify"')):
    """Removes existing [back to top] links and <a id> tags."""

    if not remove:
        return lines[:]

    out = []
    for l in lines:
        if l.startswith(remove):
            continue
        out.append(l)
    return out
def remove_lines ( lines , remove = ( '[[back to top]' , '<a class="mk-toclify"' ) ) : if not remove : return lines [ : ] out = [ ] for l in lines : if l . startswith ( remove ) : continue out . append ( l ) return out
Removes existing [back to top] links and <a id> tags.