tests/README

util._hgexecutable: default to 'hg'

This should make hooks work even if util.set_hgexecutable is not called
(e.g. hgweb.cgi).

Fixes issue625.

To run the tests, do:

cd tests/
python run-tests.py

See http://www.selenic.com/mercurial/wiki/index.cgi/WritingTests for
more information on writing tests.