Spaces in folder name cause a problem in editor online (BB-10317)

Hi!
I tried to use the editor online for changing the file which is located in folder "test test".
When I finished the editing, I clicked "Commit" button, and set the "Create a pull request for this change" checkbox in the "Commit changes" dialog, and pressed "Commit".
After it the browser redirected to pull-request page, and I found out, that the folder name is changed to test%20test/. It looks very strange.