Fix filtered link hints.
Fix filtered link hints.

For filtered link hints, " " was broken; it was treated as "space".

poacher2k/vimium,gdh1995/vimium,smblott-github/vimium,philc/vimium,decaffeinate-examples/vimium,gdh1995/vimium,mrmr1993/vimium,smblott-github/vimium,poacher2k/vimium,gdh1995/vimium,philc/vimium,decaffeinate-examples/vimium,mrmr1993/vimium,decaffeinate-examples/vimium,mrmr1993/vimium,smblott-github/vimium,poacher2k/vimium,philc/vimium