mq: test commit in repo with patches applied

tests/test-mq

@@ -103,6 +103,9 b' hg qnext'
 hg qprev
 hg qapplied
 
+echo % commit should fail
+hg commit
+
 echo % qunapplied
 hg qunapplied
 

tests/test-mq.out

@@ -102,6 +102,8 b' Now at: test.patch'
 test2.patch
 Only one patch applied
 test.patch
+% commit should fail
+abort: cannot commit over an applied mq patch
 % qunapplied
 test2.patch
 % strip