[ui] Set format_html to simple_tag output to conform to Django 1.9

beat/web/ui/templatetags/ui_tags.py

@@ -27,6 +27,7 @@
 
 from django import template
 from django.conf import settings
+from django.utils.html import format_html
 from ...common.texts import Messages as Texts
 from ... import __version__
 from collections import OrderedDict
@@ -223,7 +224,7 @@ def code_editor_scripts(modes):
 
     js = ['<script src="%s%s?v%s" type="text/javascript" charset="utf-8"></script>' % (settings.STATIC_URL, k, __version__) for k in js]
 
-    return '\n'.join(js)
+    return format_html('\n'.join(js))
 
 
 #--------------------------------------------------
@@ -240,8 +241,7 @@ def code_editor_css():
     if settings.CODEMIRROR_THEME != 'default':
         css.append('%s/theme/%s.css' % (settings.CODEMIRROR_PATH, settings.CODEMIRROR_THEME))
 
-    return '\n'.join(map(lambda x: '<link rel="stylesheet" href="%s%s?v%s" type="text/css" media="screen" />' % \
-                            (settings.STATIC_URL, x, __version__), css))
+    return format_html('\n'.join(map(lambda x: '<link rel="stylesheet" href="%s%s?v%s" type="text/css" media="screen" />' % (settings.STATIC_URL, x, __version__), css)))
 
 
 #--------------------------------------------------