tests/test-hgrc

hgmerge: fix diff+patch detection; cleanups

Details:
  - actually show help message when no tools are found
  - whitespace cleanup (stupid emacs)
  - quote more variables
  - simplify merge/diff3 error handling

#!/bin/sh

mkdir t
cd t
hg init
echo "invalid" > .hg/hgrc
hg status 2>&1 |sed -e "s:/.*\(/t/.*\):...\1:"