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
# This emulates the effects of an hg pull --rebase in which the remote repo
# already has one local mq patch
echo "[extensions]" >> $HGRCPATH
echo "graphlog=" >> $HGRCPATH
echo "rebase=" >> $HGRCPATH
echo "mq=" >> $HGRCPATH
hg init a
cd a
hg qinit -c # This must work even with a managed mq queue
echo 'c1' > c1
hg add c1
hg commit -d '0 0' -m "C1"
echo 'r1' > r1
hg add r1
hg commit -d '1 0' -m "R1"
hg up 0
hg qnew p0.patch
echo 'p0' > p0
hg add p0
hg qref -m 'P0'
hg qnew p1.patch
echo 'p1' > p1
hg add p1
hg qref -m 'P1'
hg export qtip > p1.patch
echo
echo '% "Mainstream" import p1.patch'
hg up -C 1
hg import p1.patch
rm p1.patch
echo
echo '% Rebase'
hg up -C qtip
hg rebase 2>&1 | sed -e 's/\(saving bundle to \).*/\1/'
hg glog --template '{rev} {desc} tags: {tags}\n'