Add f/F tests.
Add f/F tests.

rufusroflpunch/Vim,VSCodeVim/Vim,westim/Vim,Chillee/VSCodeNeovim,Chillee/Vim,rufusroflpunch/Vim,Chillee/VSCodeNeovim,westim/Vim,westim/Vim,Chillee/Vim,VSCodeVim/Vim,Chillee/VSCodeNeovim