a bug found on main site

[me _say]

i raised a issue in 
https://github.com/Polymer/docs/issues/2387
and
https://github.com/Polymer/polymer/issues/4943
but i was not sure that  i raised in proper place so i thought to contact you people directly
kindly resolve

onclick  its redirecting  to 404 page on apptoolbox page
on page

link : https://www.polymer-project.org/2.0/toolbox/

The bug is in

header section

Edit on GitHub link leading to 404 page

link: https://github.com/Polymer/docs/edit/master/app/2.0/toolbox/.md

some how ".md" is added in end of link which has to be removed
to resolve 404 redirection.
i also added a screen shot with highlighted error area. i hope this will be helpful