Cannot create new page in wiki when in a repo with wiki in the name from web interface. (BB-5152)

Steps to reproduce:

Create a new repository with a name ending "wiki". For example "repo-wiki"

Go to the wiki page https://bitbucket.org/<username>/repo-wiki/wiki/Home

Click the button which creates a new page ("New")

Enter any name for the new page, for example "new-page"

You will be redirected to page: https://bitbucket.org/<username>/repo-wiki/edit/new-page instead of https://bitbucket.org/<username>/repo-wiki/wiki/edit/new-page (which works fine)

Looks like /wiki/ will be left out if last four letters of the repository are "wiki".
Result: 404 error page is shown.