Fixed typo

doc-308

docs/en_us/course_authors/source/releasing_course/set_content_releasedates.rst

@@ -144,8 +144,10 @@ Modifying Public Units
 
 To make revisions to a unit that has been published, you create and edit a draft of that unit. 
 
-.. warning:: There are additional implications to modifying the public unit that has graded problem 
-            components students may have already completed.  See :ref:`Modifying a Released Problem` for more information.
+.. Warning:: 
+ There are additional implications to modifying a public unit that has graded
+ problem components students may have already completed.  See :ref:`Modifying a
+ Released Problem` for more information.
 
 To create a draft, go to the unit's page, and then click **edit a draft** in the right pane.