add comment about base URL prefixes in tests

notebook/jstest.py

@@ -222,6 +222,8 @@ class JSController(TestController):
         self.section = section
         self.xunit = xunit
         self.url = url
+        # run with a base URL that would be escaped,
+        # to test that we don't double-escape URLs
         self.base_url = '/a@b/'
         self.slimer_failure = re.compile('^FAIL.*', flags=re.MULTILINE)
         js_test_dir = get_js_test_dir()

notebook/tests/launchnotebook.py

@@ -39,6 +39,8 @@ class NotebookTestBase(TestCase):
 
     port = 12341
     config = None
+    # run with a base URL that would be escaped,
+    # to test that we don't double-escape URLs
     url_prefix = '/a%40b/'
 
     @classmethod