tests: update output for test-check-pylint.t

The py3 version on Windows appends "(previous run: 10.00/10, +0.00)" with py39.
I didn't see that for the exact same version on Linux (with py3.6.9).

Differential Revision: https://phab.mercurial-scm.org/D9536

tests/test-check-pylint.t

@@ -17,6 +17,6 b' Current checks:'
   >   mercurial hgdemandimport hgext hgext3rd | sed 's/\r$//'
   Using config file *fakerc (glob) (?)
    (?)
-  ------------------------------------ (?)
-  Your code has been rated at 10.00/10 (?)
+  ------------------------------------* (glob) (?)
+  Your code has been rated at 10.00/10* (glob) (?)
    (?)