[commands] check if prefix is None in .pages

discord/ext/commands/help.py

@@ -157,7 +157,7 @@ class Paginator:
     def pages(self):
         """Returns the rendered list of pages."""
         # we have more than just the prefix in our current page
-        if len(self._current_page) > 1:
+        if len(self._current_page) > (0 if self.prefix is None else 1):
             self.close_page()
         return self._pages