tests: glob match has a glob character for not getting a warning on windows

When / matches on / on windows, and there is no other glob character, this
results in a warning. Avoid this by using an other glob character.

tests/test-run-tests.t

@@ -65,7 +65,7 b' Windows: \\r\\n is handled like \\n and can'
 Combining esc with other markups - and handling lines ending with \r instead of \n:
 
   $ printf 'foo/bar\r'
-  foo/bar\r (no-eol) (glob) (esc)
+  fo?/bar\r (no-eol) (glob) (esc)
 #if windows
   $ printf 'foo\\bar\r'
   foo/bar\r (no-eol) (glob) (esc)