tests: move the '-hg' postfix for all style tests...
tests: move the '-hg' postfix for all style tests
We had them on 'test-check-code-hg.t' to avoid collision with the test checking
'check-code' itself. Now that this one have been rename, we can safely remove
this suffix for all of them. This get them in line with 'check-pyflakes.t'.