Update asset_mapper.rst

Author: xDeSwa

frontend/asset_mapper.rst

@@ -316,7 +316,7 @@ For example, to remove the ``lodash`` package from your importmap:
 
     $ php bin/console importmap:remove lodash
 
-This will update your ``importmap.php`` file and remove the specified package (and any dependencies added along with it).  
+This will update your ``importmap.php`` file and remove the specified package (and any dependencies added along with it).
 After running this command, it is recommended to also run:
 
 .. code-block:: terminal