tests/test-extra-filelog-entry.t

web: provide diff summary to the changeset page

This is the same message displayed at the end of the "diff --stat" command.
For example, "9 files changed, 1651 insertions(+), 2 deletions(-)".

The webutil.diffstatgen function allows the diffstat data to be lazily
calculated only once and then re-used.

Issue351: mq: qrefresh can create extra revlog entry

  $ echo "[extensions]" >> $HGRCPATH
  $ echo "mq=" >> $HGRCPATH

  $ hg init
  $ hg qinit

  $ echo b > b
  $ hg ci -A -m foo
  adding b

  $ echo cc > b
  $ hg qnew -f foo.diff
  $ echo b > b
  $ hg qrefresh

  $ hg debugindex b
     rev    offset  length   base linkrev nodeid       p1           p2
       0         0       3      0       0 1e88685f5dde 000000000000 000000000000