Fix tests for ESLint new error messages (eslint/eslint#4845)

Author: yannickcr

tests/lib/rules/jsx-uses-react.js

@@ -42,10 +42,10 @@ ruleTester.run('no-unused-vars', rule, {
   ],
   invalid: [
     {code: '/*eslint jsx-uses-react:1*/ var React;',
-     errors: [{message: '"React" is defined but never used'}], parserOptions: parserOptions},
+     errors: [{message: '\'React\' is defined but never used'}], parserOptions: parserOptions},
     {code: '/*eslint jsx-uses-react:1*/ /** @jsx Foo */ var React; <div />;',
-     errors: [{message: '"React" is defined but never used'}], parserOptions: parserOptions},
+     errors: [{message: '\'React\' is defined but never used'}], parserOptions: parserOptions},
     {code: '/*eslint jsx-uses-react:1*/ var React; <div />;',
-     errors: [{message: '"React" is defined but never used'}], settings: settings, parserOptions: parserOptions}
+     errors: [{message: '\'React\' is defined but never used'}], settings: settings, parserOptions: parserOptions}
   ]
 });

tests/lib/rules/jsx-uses-vars.js

@@ -102,21 +102,21 @@ ruleTester.run('no-unused-vars', rule, {
   invalid: [
     {
       code: '/*eslint jsx-uses-vars:1*/ var App;',
-      errors: [{message: '"App" is defined but never used'}],
+      errors: [{message: '\'App\' is defined but never used'}],
       parserOptions: parserOptions
     }, {
       code: '\
         /*eslint jsx-uses-vars:1*/\
         var App;\
         var unused;\
         React.render(<App unused=""/>);',
-      errors: [{message: '"unused" is defined but never used'}],
+      errors: [{message: '\'unused\' is defined but never used'}],
       parserOptions: parserOptions
     }, {
       code: '\
         /*eslint jsx-uses-vars:1*/\
         class unused {}',
-      errors: [{message: '"unused" is defined but never used'}],
+      errors: [{message: '\'unused\' is defined but never used'}],
       parserOptions: parserOptions
     }, {
       code: '\
@@ -128,7 +128,7 @@ ruleTester.run('no-unused-vars', rule, {
           }\
         }',
       errors: [{
-        message: '"HelloMessage" is defined but never used',
+        message: '\'HelloMessage\' is defined but never used',
         line: 1
       }],
       parserOptions: parserOptions
@@ -142,7 +142,7 @@ ruleTester.run('no-unused-vars', rule, {
           }\
         }',
       errors: [{
-        message: '"HelloMessage" is defined but never used',
+        message: '\'HelloMessage\' is defined but never used',
         line: 1
       }],
       parser: 'babel-eslint',