Clarify missing css file error message.

 * Refactored error message to use quotation marks.

Author: RolfBabijn

lib/friendly-errors/formatters/missing-css-file.js

@@ -22,7 +22,7 @@ function formatErrors(errors) {
         chalk.red('Module build failed: Module not found:')
     );
     for (let error of errors) {
-        messages.push(`'${error.file}' contains a reference to the file '${error.ref}'.`);
+        messages.push(`"${error.file}" contains a reference to the file "${error.ref}".`);
         messages.push('This file can not be found, please check it for typos or update it if the file got moved.');
         messages.push('');
     }

lib/friendly-errors/formatters/missing-loader.js

@@ -50,7 +50,7 @@ function formatErrors(errors) {
         if (error.loaderName) {
             messages.push(`${chalk.bgGreen.black('', 'FIX', '')} To ${loaderFeatures.getFeatureDescription(error.loaderName)}:`);
         } else {
-            messages.push(`${chalk.bgGreen.black('', 'FIX', '')} To load '${error.file}':`);
+            messages.push(`${chalk.bgGreen.black('', 'FIX', '')} To load "${error.file}":`);
         }
 
         let index = 0;

test/friendly-errors/formatters/missing-css-file.js

@@ -39,7 +39,7 @@ describe('formatters/missing-css-file', () => {
             };
 
             const actualErrors = formatter([error]);
-            expect(JSON.stringify(actualErrors)).to.contain('\'/some/file.css\' contains a reference to the file \'../images/foo.png\'');
+            expect(JSON.stringify(actualErrors)).to.contain('\\"/some/file.css\\" contains a reference to the file \\"../images/foo.png\\"');
             expect(JSON.stringify(actualErrors)).to.contain('This file can not be found, please check it for typos or update it if the file got moved.');
             // all needed packages will be present when running tests
             expect(JSON.stringify(actualErrors)).to.not.contain('yarn add');

test/friendly-errors/formatters/missing-loader.js

@@ -52,7 +52,7 @@ describe('formatters/missing-loader', () => {
             };
 
             const actualErrors = formatter([error]);
-            expect(JSON.stringify(actualErrors)).to.contain('To load \'/some/file.jpg\'');
+            expect(JSON.stringify(actualErrors)).to.contain('To load \\"/some/file.jpg\\"');
             expect(JSON.stringify(actualErrors)).to.contain('You may need to install and configure a special loader');
         });