Update CONTRIBUTING.md

Co-authored-by: Noah Stapp <[email protected]>

Author: sleepyStick

CONTRIBUTING.md

@@ -448,11 +448,10 @@ If there are changes, a PR will be generated by mongodb-drivers-pr-bot.
 If any errors occurred, the PR description will display the name of the spec along
 with stderr from the `bash resync-spec.sh <spec>` command.
 
-Naturally, there will be spec tests that will fail if merged since the associated fix
-or behavioral change has not been implemented yet. For existing tests that have been
-modified, we will add these changes to a patch file (in `/.evergreen/spec-patch`). Each patch
-file will be named after a PYTHON ticket and the contents of the file will be the associated
-test differences between PyMongo's tests and the specification.
+Spec test changes associated with a behavioral change or bugfix that has yet to be implemented in PyMongo 
+must be added to a patch file in `/.evergreen/spec-patch`. Each patch
+file must be named after the associated PYTHON ticket and contain the
+test differences between PyMongo's current tests and the specification.
 All changes listed in these patch files will be *undone* by the script and won't
 be applied to PyMongo's tests.