Remove trailing space from 'Int' description

Replicates graphql/graphql-js@5eecef2

Author: Cito

graphql/type/scalars.py

@@ -82,7 +82,7 @@ def parse_int_literal(ast, _variables=None):
     name="Int",
     description="The `Int` scalar type represents"
     " non-fractional signed whole numeric values."
-    " Int can represent values between -(2^31) and 2^31 - 1. ",
+    " Int can represent values between -(2^31) and 2^31 - 1.",
     serialize=serialize_int,
     parse_value=coerce_int,
     parse_literal=parse_int_literal,