Merge pull request stephenmcd#1912 from pik-software/context-manager

forms.admin: add context manager

Author: stephenmcd

mezzanine/forms/admin.py

@@ -169,10 +169,10 @@ def file_view(self, request, field_entry_id):
         field_entry = get_object_or_404(FieldEntry, id=field_entry_id)
         path = join(fs.location, field_entry.value)
         response = HttpResponse(content_type=guess_type(path)[0])
-        f = open(path, "r+b")
-        response["Content-Disposition"] = "attachment; filename=%s" % f.name
-        response.write(f.read())
-        f.close()
+        with open(path, "r+b") as f:
+            response["Content-Disposition"] = ("attachment; filename=%s"
+                                               % f.name)
+            response.write(f.read())
         return response
 
 admin.site.register(Form, FormAdmin)