Changed semantics of prev_rev: if no previous revision, there is no entry.
* cvs2svn_lib/collect_data.py (FileDataCollector.__init__): Updated
comments.
(FileDataCollector.define_revision): Don't store anything to
prev_rev if next is None.
(FileDataCollector._resync_chain,
FileDataCollector.set_revision_info): Use prev_rev.get() to get old
behavior. (Omit None as second argument to get(), as it is the
default.)
git-svn-id: http://cvs2svn.tigris.org/svn/cvs2svn/trunk@2085 be7e6eca-30d4-0310-a8e5-ac0d63af7087