fixup typo

HeahDude · HeahDude · commit 2dd6c56e8baa · 2018-05-07T21:26:35.000+02:00
diff --git a/reference/forms/types/options/choice_type_trim.rst.inc b/reference/forms/types/options/choice_type_trim.rst.inc
@@ -4,4 +4,4 @@ trim
 **type**: ``boolean`` **default**: ``false``
 
 Trimming is disabled by default because the selected value or values must match
-the given choice values exactly (and they could contain white spaces).
+the given choice values exactly (and they could contain whitespaces).
