Add test for PR #5293 (#5325)

* Test that trailing os.sep are ignored while searching PATH
* Simplify paths list creation

news/5325.bugfix

+Add test for PR 5293: Remove trailing os.sep to avoid false negatives

tests/unit/test_wheel.py

@@ -463,3 +463,10 @@ class TestMessageAboutScriptsNotOnPATH(object):
             assert retval is None
         else:
             assert retval is not None
+
+    def test_trailing_ossep_removal(self):
+        retval = self._template(
+            paths=[os.path.join('a', 'b', '')],
+            scripts=[os.path.join('a', 'b', 'c')]
+        )
+        assert retval is None