Fixed #15683 -- Prevented escaped string to be needlessly marked safe twice in force_escape filter. Thanks tyrion for the initial patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@17876 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/template/defaultfilters.py

@@ -419,7 +419,7 @@ def force_escape(value):
     characters (as opposed to "escape", which marks the content for later
     possible escaping).
     """
-    return mark_safe(escape(value))
+    return escape(value)
 
 @register.filter("linebreaks", is_safe=True, needs_autoescape=True)
 @stringfilter