minor #11520 add blank line before directive (OskarStark)

This PR was merged into the 4.2 branch.

Discussion
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add blank line before directive

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Commits
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6c6e624 add blank line before directive

Author: javiereguiluz

components/messenger.rst

@@ -303,6 +303,7 @@ middleware will know it should not route these messages again to a transport.
 
 Learn more
 ----------
+
 .. toctree::
     :maxdepth: 1
     :glob:

messenger.rst

@@ -823,6 +823,7 @@ will give you access to the following services:
 
 Learn more
 ----------
+
 .. toctree::
     :maxdepth: 1
     :glob:

workflow.rst

@@ -533,6 +533,7 @@ requires:
                             metadata:
                                 priority: 0.5
                         # ...
+
     .. code-block:: xml
 
         <!-- config/packages/workflow.xml -->