run-tests.py: Show paths to failing tests, .err and .out
I think this is very convenient when investigating and fixing test failures,
but perhaps it must be tweaked further to show paths if and only if
it is appropriate.
#!/bin/sh
echo "[extensions]" >> $HGRCPATH
echo "hgk=" >> $HGRCPATH
hg init repo
cd repo
echo a > a
hg ci -Am adda
hg debug-cat-file commit 0