tests: fix test-run-tests.py on OS X

Do the same hack as in test-doctests.py to let the test pass on OS X.

tests/test-run-tests.py

@@ -1,84 +1,87 b''
 """test line matching with some failing examples and some which warn
 
 run-test.t only checks positive matches and can not see warnings
 (both by design)
 """
 
-
-import doctest, os, re
+import os, re
+# this is hack to make sure no escape characters are inserted into the output
+if 'TERM' in os.environ:
+    del os.environ['TERM']
+import doctest
 run_tests = __import__('run-tests')
 
 def lm(expected, output):
     r"""check if output matches expected
 
     does it generally work?
         >>> lm('H*e (glob)\n', 'Here\n')
         True
 
     fail on bad test data
         >>> try: lm('a\n','a')
         ... except AssertionError, ex: print ex
         missing newline
         >>> try: lm('single backslash\n', 'single \backslash\n')
         ... except AssertionError, ex: print ex
         single backslash or unknown char
     """
     assert expected.endswith('\n') and output.endswith('\n'), 'missing newline'
     assert not re.search(r'[^ \w\\/\r\n()*?]', expected + output), \
            'single backslash or unknown char'
     match = run_tests.linematch(expected, output)
     if isinstance(match, str):
         return 'special: ' + match
     else:
         return bool(match) # do not return match object
 
 def wintests():
     r"""test matching like running on windows
 
     enable windows matching on any os
         >>> _osaltsep = os.altsep
         >>> os.altsep = True
 
     valid match on windows
         >>> lm('g/a*/d (glob)\n', 'g\\abc/d\n')
         True
 
     direct matching, glob unnecessary
         >>> lm('g/b (glob)\n', 'g/b\n')
         'special: -glob'
 
     missing glob
         >>> lm('/g/c/d/fg\n', '\\g\\c\\d/fg\n')
         'special: +glob'
 
     restore os.altsep
         >>> os.altsep = _osaltsep
     """
-    os.altsep # for pyflakes, because it does not see os in the doctest
+    pass
 
 def otherostests():
     r"""test matching like running on non-windows os
 
     disable windows matching on any os
         >>> _osaltsep = os.altsep
         >>> os.altsep = False
 
     backslash does not match slash
         >>> lm('h/a* (glob)\n', 'h\\ab\n')
         False
 
     direct matching glob can not be recognized
         >>> lm('h/b (glob)\n', 'h/b\n')
         True
 
     missing glob can not not be recognized
         >>> lm('/h/c/df/g/\n', '\\h/c\\df/g\\\n')
         False
 
     restore os.altsep
         >>> os.altsep = _osaltsep
     """
     pass
 
 if __name__ == '__main__':
     doctest.testmod()