rebase: provides test case for (issue5610)

The 4.2 release introduces a regression regarding the behavior of rebase with
some hook failures. We add the tests from the bug report from Henrik Stuart to
our test base to prevent further regression on this.

tests/test-rebase-interruptions.t

@@ -271,4 +271,56 b' Abort the rebasing:'
   |/
   o  0:public 'A'
   
+
+Test rebase interrupted by hooks (pretxncommit)
+
+  $ hg up 2
+  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ echo F > F
+  $ hg add F
+  $ hg ci -m F
+  $ hg rebase --source 2 --dest 5 --tool internal:other --config 'hooks.pretxncommit=hg log -r $HG_NODE | grep "summary:     C"'
+  rebasing 2:965c486023db "C"
+  summary:     C
+  rebasing 6:a0b2430ebfb8 "F" (tip)
+  transaction abort!
+  rollback completed
+  abort: pretxncommit hook exited with status 1
+  [255]
+  $ hg tglogp
+  @  7:secret 'C'
+  |
+  | @  6:secret 'F'
+  | |
+  o |  5:public 'B'
+  | |
+  o |  4:public 'E'
+  | |
+  o |  3:public 'D'
+  | |
+  | o  2:secret 'C'
+  | |
+  | o  1:public 'B'
+  |/
+  o  0:public 'A'
+  
+  $ hg rebase --continue
+  already rebased 2:965c486023db "C" as 401ccec5e39f
+  rebasing 6:a0b2430ebfb8 "F"
+  saved backup bundle to $TESTTMP/a3/.hg/strip-backup/965c486023db-aa6250e7-backup.hg (glob)
+  $ hg tglogp
+  @  6:secret 'F'
+  |
+  o  5:secret 'C'
+  |
+  o  4:public 'B'
+  |
+  o  3:public 'E'
+  |
+  o  2:public 'D'
+  |
+  | o  1:public 'B'
+  |/
+  o  0:public 'A'
+  
   $ cd ..