Better XSS Fix (#12483)

* Revert "fix(test): adjust expectations"

This reverts commit 205436d5b1.

* Revert "fix(escaping): global inoffensive apostrophe"

This reverts commit 2b8f94b244.

* change <%- to <%=

* fix interpolation only where necessary

* remove unused variable

website/common/script/i18n.js

@@ -1,6 +1,5 @@
 import isString from 'lodash/isString';
 import clone from 'lodash/clone';
-import forEach from 'lodash/forEach';
 import template from 'lodash/template';
 
 const i18n = {
@@ -37,16 +36,9 @@ function t (stringName) {
 
   const clonedVars = clone(vars) || {};
 
-  forEach(clonedVars, (val, key) => {
-    if (typeof clonedVars[key] === 'string') {
-      clonedVars[key] = clonedVars[key].replace(/'/g, '’');
-    }
-  });
-
   clonedVars.locale = locale;
 
   if (string) {
-    string = string.replace(/'/g, '’');
     try {
       return template(string)(clonedVars);
     } catch (_error) {