tests/test-backwards-remove.t

context: use changelogrevision

Upcoming patches will make the changelogrevision object perform
lazy parsing. Let's switch to it.

Because we're switching from a tuple to an object, everthing that
accesses the internal cached attribute needs to be updated to access
via attributes. A nice side-effect is this makes the code easier to
read!

Surprisingly, this appears to make revsets accessing this data
slightly faster (values are before series, p1, this patch):

author(mpm)
0.896565
0.929984
0.914234

desc(bug)
0.887169
0.935642
0.921073

date(2015)
0.878797
0.908094
0.891980

extra(rebase_source)
0.865446
0.922624
0.912514

author(mpm) or author(greg)
1.801832
1.902112
1.860402

author(mpm) or desc(bug)
1.812438
1.860977
1.844850

date(2015) or branch(default)
0.968276
1.005824
0.994673

author(mpm) or desc(bug) or date(2015) or extra(rebase_source)
3.656193
3.743381
3.721032

  $ hg init
  $ echo This is file a1 > a
  $ hg add a
  $ hg commit -m "commit #0"
  $ ls
  a
  $ echo This is file b1 > b
  $ hg add b
  $ hg commit -m "commit #1"
  $ hg co 0
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

B should disappear

  $ ls
  a