fix unnecessary unescape

Author: tsukasaoishi

test/fixtures/slim-lang.slim

@@ -130,15 +130,15 @@ html[xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"]
               | render
             span.string
               | 'footer'
-            |  | Copyright © #{year} #{author} 
+            |  | Copyright © #{year} #{author} 
       p.foot.up
         |  Source: 
         a[href="http://github.com/slim-template/slim"]
           | slim-template/slim
-        |  | Slim maintained by 
+        |  | Slim maintained by 
         a[href="http://github.com/minad"]
           | minad
-        |  | Logo & design by 
+        |  | Logo & design by 
         a[href="http://github.com/activestylus"]
           | activestylus
         br