Fix for Python 2.3 compatibility.
Note: Name of comparing function of sort() is "cmpfunc" in Python 2.3
and "cmp" in Python 2.4.
changeset = '{rev}{tags}{parents} {node|short} {date|isodate} {author|user}\n {desc|firstline|strip}\n\n'
changeset_quiet = '{rev}:{node|short}\n'
start_tags = '['
tag = '{tag},'
last_tag = '{tag}]'
start_parents = ':'
parent = '{rev},'
last_parent = '{rev}'