Wrap lines in create-a-case.rst

doc/source/users_guide/create-a-case.rst

@@ -211,7 +211,12 @@ It is important to note that the file containing the **xmlchange**
 commands must be named ``shell_commands`` in order for it to be recognised
 and run upon case creation.
 
-The structure of the component directories do not need to be the same as in the component source code. As an example, should the user want to modify the ``src/dynamics/eul/dyncomp.F90`` file within the CAM source code, the modified file should be put into the ``SourceMods/src.cam`` directly. There is no need to mimic the source code structure, such as ``SourceMods/src.cam/dynamics/eul``.
+The structure of the component directories do not need to be the 
+same as in the component source code. As an example, should the user
+want to modify the ``src/dynamics/eul/dyncomp.F90`` file within the 
+CAM source code, the modified file should be put into the directory 
+``SourceMods/src.cam`` directly. There is no need to mimic the source
+code structure, such as ``SourceMods/src.cam/dynamics/eul``.
 
 When the user calls **create_newcase** with the ``--user-mods-dir`` pointing to the
 full pathname of the directory containing these changes, then the ``CASEROOT`` will be