* Small but important fixes needed in existing features:
+** whitespace-cleanup should work only on the region if the region is active.
+
** Distribute a bar cursor of width > 1 evenly between the two glyphs
on each side of the bar (what to do at the edges?).
** Make vc-checkin avoid reverting the buffer if has not changed after
the checkin. Comparing (md5 BUFFER) to (md5 FILE) should be enough.
-** Make vc-annotate show place the cursor in the annotate buffer at the
- same line as the current buffer.
-
** buffer-offer-save should be a permanent local.
** revert-buffer should eliminate overlays and the mark.