Fix regexp

Author: adrien1018

app/controllers/application_controller.rb

@@ -106,7 +106,7 @@ def configure_permitted_parameters
   end
 
   def set_layout_and_contest
-    if /^\/contests\/./.match(request.fullpath) && !/^\/contests\/new\/?/.match(request.fullpath)
+    if /^\/contests\/./.match(request.fullpath) && !/^\/contests\/new(\/|$)/.match(request.fullpath)
       # Use arbitrary character here instead of [0-9] to give proper 404 to requests such as /contests/abcde
       # However, we need to exclude /contests/new
       @layout = :contest