Merge pull request #2955 from gryBox/master

fix apply_map doc string formatting

Author: jcrist

src/prefect/utilities/tasks.py

@@ -68,6 +68,7 @@ def inc_if_even(x):
 
     with Flow("example") as flow:
         apply_map(inc_if_even, range(10))
+    ```
     """
     from prefect.tasks.core.constants import Constant