tests/test-config-case.t

tests: compatibility fix.

'touch -d *' doesn't work on Mac OS X. In order to prevent this from
occuring again, a check for the case is added to 'check-code.py'.

  $ echo '[Section]' >> $HGRCPATH
  $ echo 'KeY = Case Sensitive' >> $HGRCPATH
  $ echo 'key = lower case' >> $HGRCPATH

  $ hg showconfig Section
  Section.KeY=Case Sensitive
  Section.key=lower case