Fix spaces

Author: wkania

reference/constraints/UniqueEntity.rst

@@ -404,8 +404,8 @@ fields configured in the ``fields`` option). The method should return a
 
 .. warning::
 
-    This constraint does not support Doctrine types such as ``simple_array``, 
-    ``json``, or ``jsonb``, nor does it handle association mappings like 
+    This constraint does not support Doctrine types such as ``simple_array``,
+    ``json``, or ``jsonb``, nor does it handle association mappings like
     ``One-To-Many`` and ``Many-To-Many`` relationships. To perform uniqueness
     checks on such fields, you must define a custom ``repositoryMethod`` that
     implements the desired logic.