additional slash in pagination_links

[ghost]

When using {{ pagination_links }} the generated URL contains an additional slash which seems to be not necessary.

I have a subfolder for my blog posts and use pagination_sub_page = true. This leads to the following pagination link containing an additional slash:

http://localhost/pico//blog/1

Blog posts a reachable under the following URL without additional slash:

http://localhost/pico/blog/my_blog_post