Remove trailing whitespace

Author: handrews

jsonschema-core.xml

@@ -2377,8 +2377,8 @@
                         </t>
                         <t>
                             This keyword produces an annotation value which is an array of
-                            the indexes to which this keyword validates successfully when applying 
-                            its subschema, in ascending order. The value MAY be a boolean true if the 
+                            the indexes to which this keyword validates successfully when applying
+                            its subschema, in ascending order. The value MAY be a boolean true if the
                             subschema validated successfully when applied to every index of the instance.
                         </t>
                     </section>