Add some comments.

Author: JulienPalard

Lib/gettext.py

@@ -417,6 +417,7 @@ def _parse(self, fp):
                     item = b_item.decode().strip()
                     if not item:
                         continue
+                    # Skip over comment lines:
                     if item.startswith('#-#-#-#-#') and item.endswith('#-#-#-#-#'):
                         continue
                     k = v = None

Lib/test/test_gettext.py

@@ -685,6 +685,12 @@ def test_plural_form_error_issue17898(self):
             t = gettext.GNUTranslations(fp)
 
     def test_ignore_comments_in_headers_issue36239(self):
+        """Checks that comments like:
+
+            #-#-#-#-#  messages.po (EdX Studio)  #-#-#-#-#
+
+        are ignored.
+        """
         with open(MOFILE, 'wb') as fp:
             fp.write(base64.decodebytes(GNU_MO_DATA_ISSUE_17898))
         with open(MOFILE, 'rb') as fp: