Improve range formatting

Author: brandonkelly

src/i18n/I18N.php

@@ -350,6 +350,9 @@ public function translate($category, $message, $params, $language)
             }
         }
 
+        // Normalize ranges to use thin spaces and en-dashes (see https://clagnut.com/blog/2419)
+        $translation = preg_replace('/(?<=\d) ?(?:-|–|—) ?(?=\d)/', ' – ', $translation);
+
         if ($this->_shouldAddTranslationDebugOutput()) {
             switch ($category) {
                 case 'site':

src/web/assets/cp/dist/cp.js

@@ -83,10 +83,11 @@ $.extend(Craft, {
     }
 
     if (params) {
-      return this.formatMessage(message, params);
+      message = this.formatMessage(message, params);
     }
 
-    return message;
+    // Normalize ranges to use thin spaces and en-dashes (see https://clagnut.com/blog/2419)
+    return message.replace(/(\d) ?(?:-|–|—) ?(\d)/, '$1 – $2', message);
   },
 
   formatMessage: function (pattern, args) {