Unify wording in error messages.

neelance · neelance · commit ba401e154461 · 2017-03-22T16:18:59.000+01:00
Before this change there was:
- There can be only one argument named ...
- There can be only one input field named ...
- There can be only one variable named ...
- There can only be one fragment named ...
- There can only be one operation named ...

Now the last two match the others.
diff --git a/src/validation/rules/UniqueFragmentNames.js b/src/validation/rules/UniqueFragmentNames.js
@@ -13,7 +13,7 @@ import { GraphQLError } from '../../error';
 
 
 export function duplicateFragmentNameMessage(fragName: string): string {
-  return `There can only be one fragment named "${fragName}".`;
+  return `There can be only one fragment named "${fragName}".`;
 }
 
 /**
diff --git a/src/validation/rules/UniqueOperationNames.js b/src/validation/rules/UniqueOperationNames.js
@@ -13,7 +13,7 @@ import { GraphQLError } from '../../error';
 
 
 export function duplicateOperationNameMessage(operationName: string): string {
-  return `There can only be one operation named "${operationName}".`;
+  return `There can be only one operation named "${operationName}".`;
 }
 
 /**

Original file line number	Diff line number	Diff line change
`@@ -13,7 +13,7 @@ import { GraphQLError } from '../../error';`
`13`	`13`
`14`	`14`
`15`	`15`	`export function duplicateFragmentNameMessage(fragName: string): string {`
`16`		- return `There can only be one fragment named "${fragName}".`;
	`16`	+ return `There can be only one fragment named "${fragName}".`;
`17`	`17`	`}`
`18`	`18`
`19`	`19`	`/**`