ui: look before you leap on sys.stderr.closed (and look nicer)
f83291e5643e introduced a fix if sys.stdout.closed does not exist.
This change uses a getattr with default instead of hasattr (which just calls
getattr) and accessing the attribute.
Additionally it applies the same fix for sys.stderr.closed as this is not
available in the bpython shell (reported by Roger Gammans).
marked working directory as branch a
adding foo
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
marked working directory as branch c
created new head
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
updating to branch a
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
marked working directory as branch b
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
marked working directory as branch b
created new head
in rev c branch a
1:dd6e60a716c6
2:f25d57ab0566
1:dd6e60a716c6
2:f25d57ab0566
out branch .
2:65511d0e2b55
2:65511d0e2b55
clone branch b
requesting all changes
adding changesets
adding manifests
adding file changes
added 3 changesets with 3 changes to 1 files (+1 heads)
updating to branch b
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
2:65511d0e2b55
1:b84708d77ab7
2:65511d0e2b55
clone rev a branch b
requesting all changes
adding changesets
adding manifests
adding file changes
added 3 changesets with 3 changes to 1 files (+1 heads)
updating to branch a
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
2:65511d0e2b55
1:b84708d77ab7
0:5b65ba7c951d