Fix
issue1495, corner case of adding empty files via patching
#!/bin/sh
cat <<EOF >> $HGRCPATH
[extensions]
notify=
[hooks]
changegroup.notify = python:hgext.notify.hook
[notify]
sources = push
diffstat = False
maxsubject = 200
[usersubs]
foo@bar = *
[reposubs]
* = baz
EOF
hg init a
echo % clone
hg --traceback clone a b
echo a > b/a
echo % commit
hg --traceback --cwd b commit -Ama
echo a >> b/a
echo % commit
hg --traceback --cwd b commit -Amb
echo % push
hg --traceback --cwd b push ../a 2>&1 |
python -c 'import sys,re; print re.sub("\n\t", " ", sys.stdin.read()),' |
sed -e 's/\(Message-Id:\).*/\1/' \
-e 's/changeset \([0-9a-f]* *\)in .*test-notif/changeset \1in test-notif/' \
-e 's/^Subject: .*test-notify/Subject: test-notify/' \
-e 's/^details: .*test-notify/details: test-notify/' \
-e 's/^Date:.*/Date:/'