Improve quoteString and use it

rules/string-content.js

@@ -1,5 +1,6 @@
 'use strict';
 const getDocumentationUrl = require('./utils/get-documentation-url');
+const quoteString = require('./utils/quote-string');
 const replaceTemplateElement = require('./utils/replace-template-element');
 const escapeTemplateElementRaw = require('./utils/escape-template-element-raw');
 
@@ -81,14 +82,12 @@ const create = context => {
 				return;
 			}
 
-			let fixed = string.replace(replacement.regex, suggest);
+			const fixed = string.replace(replacement.regex, suggest);
 			if (type === 'Literal') {
-				const quote = node.raw[0];
-				fixed = fixed
-					.replace(new RegExp(quote, 'g'), `\\${quote}`)
-					.replace(/\r/g, '\\r')
-					.replace(/\n/g, '\\n');
-				problem.fix = fixer => fixer.replaceText(node, quote + fixed + quote);
+				problem.fix = fixer => fixer.replaceText(
+					node,
+					quoteString(fixed, node.raw[0])
+				);
 			} else {
 				problem.fix = fixer => replaceTemplateElement(
 					fixer,

rules/utils/quote-string.js

@@ -1,9 +1,16 @@
 'use strict';
 
 /**
-Escape apostrophe and wrap the result in single quotes.
+Escape string and wrap the result in quotes.
 
 @param {string} string - The string to be quoted.
-@returns {string} - The quoted string.
+@param {quote} string - The quote character.
+@returns {string} - The quoted and escaped string.
 */
-module.exports = string => `'${string.replace(/'/g, '\\\'')}'`;
+module.exports = (string, quote = '\'') => {
+	const escaped = string
+		.replace(new RegExp(quote, 'g'), `\\${quote}`)
+		.replace(/\r/g, '\\r')
+		.replace(/\n/g, '\\n');
+	return quote + escaped + quote;
+};