tests/test-diffdir

Corrected "waiting for lock on repository FOO held by BAR" message.
BAR was the error number and not the locker name.
Use repr on BAR, so problems can be detected easier.

#!/bin/sh

hg init
touch a
hg add a
hg ci -m "a" -d "1000000 0"

echo 123 > b
hg add b
hg diff --nodates

hg diff --nodates -r tip

echo foo > a
hg diff --nodates