tests/test-issue619.t

revset: duplicate spanset.__contains__ to fullreposet for modification

1d7a2771aa36 says we should avoid function calls in __contains__, so
super(fullreposet, self).__contains__(rev) is not an option.

Actually the super call doubled the benchmark result of trivial query:

revisions:
0) 678f53865c68 (tip when I wrote this patch)
1) rev == node.nullrev or super(fullreposet, self).__contains__(rev)

revset #0: tip:0
0) wall 0.008441 comb 0.010000 user 0.010000 sys 0.000000 (best of 282)
1) wall 0.016152 comb 0.010000 user 0.010000 sys 0.000000 (best of 146)

http://mercurial.selenic.com/bts/issue619

  $ hg init
  $ echo a > a
  $ hg ci -Ama
  adding a

  $ echo b > b
  $ hg branch b
  marked working directory as branch b
  (branches are permanent and global, did you want a bookmark?)
  $ hg ci -Amb
  adding b

  $ hg co -C 0
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

Fast-forward:

  $ hg merge b
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg ci -Ammerge

Bogus fast-forward should fail:

  $ hg merge b
  abort: merging with a working directory ancestor has no effect
  [255]

Even with strange revset (issue4465)

  $ hg merge ::.
  abort: merging with a working directory ancestor has no effect
  [255]