Take a dictionary and write out they key/value pairs in ANVL format

def writeANVLString(ANVLDict):
    """
    Take a dictionary and write out they key/value pairs in ANVL format
    """
    lines = []
    keys = ANVLDict.keys()
    keys.sort()
    for key in keys:
        value = ANVLDict[key]
        offset = len(key) + 1
        line = "%s: %s" % (key, breakString(value, 79, offset))
        lines.append(line)
    return "\n".join(lines)