test-branches: add a test for long branch name (issue 1230)

tests/test-branches

@@ -33,7 +33,7 b' hg commit -d \'5 0\' -u test -m "Adding c '
 
 echo 'd' >d
 hg add d
-hg branch d
+hg branch 'a branch name much longer than the default justification used by branches'
 hg commit -d '6 0' -u test -m "Adding d branch"
 
 hg branches

tests/test-branches.out

@@ -5,14 +5,14 b' created new head'
 0 files updated, 0 files merged, 1 files removed, 0 files unresolved
 created new head
 marked working directory as branch c
-marked working directory as branch d
-d                              6:9c581c5ff105
+marked working directory as branch a branch name much longer than the default justification used by branches
+a branch name much longer than the default justification used by branches 6:b8cb5af34c4d
 b                              4:22df7444f7c1
 a                              1:dd6b440dd85a
 c                              5:5ca481e59b8c (inactive)
 default                        0:19709c5a4e75 (inactive)
 -------
-d                              6:9c581c5ff105
+a branch name much longer than the default justification used by branches 6:b8cb5af34c4d
 b                              4:22df7444f7c1
 a                              1:dd6b440dd85a
 --- Branch a