minor #9943 Fix configuration-block not working (keichinger)

This PR was merged into the 4.0 branch.

Discussion
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Fix configuration-block not working

The `::` shorthand in the line before the `.. configuration-block::` breaks the entire block.

Commits
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f952c32 Fix configuration-block not working

Author: javiereguiluz

routing/redirect_in_config.rst

@@ -185,7 +185,7 @@ The :method:`Symfony\\Bundle\\FrameworkBundle\\Controller\\RedirectController::u
 and :method:`Symfony\\Bundle\\FrameworkBundle\\Controller\\RedirectController::redirectAction`
 methods accept an additional argument called ``keepRequestMethod``. When it's
 set to ``true``, temporary redirects use ``307`` code instead of ``302`` and
-permanent redirects use ``308`` code instead of ``301``::
+permanent redirects use ``308`` code instead of ``301``:
 
 .. configuration-block::