Document hint descriptors.
Document hint descriptors.

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