Add complex test case

Author: kamikat

src/__tests__/__snapshots__/multi-line-escaped-text.test.js.snap

@@ -1,17 +1,17 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`JavaScript output: transformed source code 1`] = `"module.exports = <div>foo{\\"\\\\n\\"}{['bar', '123\\\\nabc'.split('\\\\n').join('.')].join('')}</div>;"`;
+exports[`JavaScript output: transformed source code 1`] = `"module.exports = <div>foo{\\"\\\\n\\"}{['bar', '123\\\\n\\\\'abc\\\\n'.split('\\\\n').join('\\"').split(\\"'\\").join('@')].join('')}</div>;"`;
 
 exports[`html output: generated html 1`] = `
 <div>
   foo
+  
 
-
-  bar123.abc
+  bar123"@abc"
 </div>
 `;
 
 exports[`static html output: static html 1`] = `
 "<div>foo
-bar123.abc</div>"
+bar123&quot;@abc&quot;</div>"
 `;

src/__tests__/multi-line-escaped-text.input.js

@@ -1 +1 @@
-module.exports = pug`div.\n    foo\n    bar${'123\nabc'.split('\n').join('.')}`;
+module.exports = pug`div.\n    foo\n    bar${'123\n\'abc\n'.split('\n').join('"').split("'").join('@')}`;