fix missing blankline

mkdocs/labs.md

@@ -135,7 +135,7 @@ We can search for items that match one of several conditions:
 If the list of arguments is empty, there is no match:
 ```python
 >>> q.find()
-
+<BLANKLINE>
 ```
 
 To add match several conditions at once, the `filter` method can be used:
@@ -260,4 +260,4 @@ Calling the finder as a method works too:
 #{'author': MetaInlines([Str('John'), Space(), Str('MacFarlane')]), 'date': MetaInlines([Str('2021-06-19')]), 'license': MetaInlines([Link(('', [], []), [Str('CC-BY-SA'), Space(), Str('4.0')], ('http://creativecommons.org/licenses/by-sa/4.0/', ''))]), 'title': MetaInlines([Str('CommonMark'), Space(), Str('Spec')]), 'version': MetaInlines([Str('0.30')])})
 ```
 
--->
+-->