tests/test-diffdir

Update tests to use commit -m and default -u

manifest hash: 6e4385453843031a712005a320d6000595b40d05

#!/bin/sh

hg init
touch a
hg add a
hg ci -m "a" -d "0 0"

echo 123 > b
hg add b
hg diff | sed "s/\(\(---\|+++\).*\)\t.*/\1/"

hg diff -r tip | sed "s/\(\(---\|+++\).*\)\t.*/\1/"