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).
#!/bin/sh
echo "[extensions]" >> $HGRCPATH
echo "bookmarks=" >> $HGRCPATH
echo "mq=" >> $HGRCPATH
hg init
echo qqq>qqq.txt
echo % add file
hg add
echo % commit first revision
hg ci -m 1 -u user -d "1 0"
echo % set bookmark
hg book test
echo www>>qqq.txt
echo % commit second revision
hg ci -m 2 -u usr -d "1 0"
echo % set bookmark
hg book test2
echo % update to -2
hg update -r -2
echo eee>>qqq.txt
echo % commit new head
hg ci -m 3 -u user -d "1 0"
echo % bookmarks updated?
hg book
echo % strip to revision 1
hg strip 1 2>&1 | sed 's/\(saving bundle to \).*/\1/'
echo % list bookmarks
hg book