Minor tweaking of previous r78734, and add a NEWS entry.
diff --git a/Misc/NEWS b/Misc/NEWS
index a60e6fd..55ab2dc 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -126,6 +126,9 @@
 Tests
 -----
 
+- The four path modules (genericpath, macpath, ntpath, posixpath) share a
+  common TestCase for some tests: test_genericpath.CommonTest.
+
 - Print platform information when running the whole test suite, or using
   the --verbose flag.