Add missing Yields section to the documentation

This is necessary because now we are checking for docs style in tests
and benchmarks too.

Signed-off-by: Leandro Lucarella <[email protected]>

Author: llucax

tests/utils/test_file_watcher.py

@@ -39,6 +39,9 @@ async def fake_awatch(
         Args:
             *paths: Paths to watch.
             **kwargs: Keyword arguments to pass to the awatch function.
+
+        Yields:
+            The file changes in the sequence provided to the constructor.
         """
         for change in self.changes:
             yield {change}