Fix grammar in error message (graphql#1782)

Cito · IvanGoncharov · commit 2daa0ed05e5d · 2019-03-11T00:14:49.000+02:00
diff --git a/src/type/__tests__/schema-test.js b/src/type/__tests__/schema-test.js
@@ -312,7 +312,7 @@ describe('Type System: Schema', () => {
         });
 
         expect(() => new GraphQLSchema({ query: QueryType })).to.throw(
-          'Schema must contain unique named types but contains multiple types named "String".',
+          'Schema must contain uniquely named types but contains multiple types named "String".',
         );
       });
 
@@ -323,7 +323,7 @@ describe('Type System: Schema', () => {
         ];
 
         expect(() => new GraphQLSchema({ types })).to.throw(
-          'Schema must contain unique named types but contains multiple types named "SameName".',
+          'Schema must contain uniquely named types but contains multiple types named "SameName".',
         );
       });
 
@@ -338,7 +338,7 @@ describe('Type System: Schema', () => {
         });
 
         expect(() => new GraphQLSchema({ query: QueryType })).to.throw(
-          'Schema must contain unique named types but contains multiple types named "SameName".',
+          'Schema must contain uniquely named types but contains multiple types named "SameName".',
         );
       });
     });
diff --git a/src/type/schema.js b/src/type/schema.js
@@ -344,7 +344,7 @@ function typeMapReducer(map: TypeMap, type: ?GraphQLType): TypeMap {
   if (map[type.name]) {
     invariant(
       map[type.name] === type,
-      'Schema must contain unique named types but contains multiple ' +
+      'Schema must contain uniquely named types but contains multiple ' +
         `types named "${type.name}".`,
     );
     return map;
