[1.5.x] Fixed #20008 -- Removed trailing slash in Wikipedia link
[1.5.x] Fixed #20008 -- Removed trailing slash in Wikipedia link

Thanks senden9 at gmail.com for the report.
Backport of 63c52dcbcd from master.

ccn-2m/django,bliti/django-nonrel-1.5,hasadna/django,ccn-2m/django,imtapps/django-imt-fork,alx-eu/django,hasadna/django,bliti/django-nonrel-1.5,bliti/django-nonrel-1.5,alx-eu/django,imtapps/django-imt-fork,alx-eu/django,ccn-2m/django,imtapps/django-imt-fork,alx-eu/django,ccn-2m/django,hasadna/django