Reverse string validity checks

Author: rmosolgo

lib/graphql/types/string.rb

@@ -7,7 +7,7 @@ class String < GraphQL::Schema::Scalar
 
       def self.coerce_result(value, ctx)
         str = value.to_s
-        if str.ascii_only? || str.encoding == Encoding::UTF_8
+        if str.encoding == Encoding::UTF_8 || str.ascii_only?
           str
         elsif str.frozen?
           str.encode(Encoding::UTF_8)