fix test cases and add support for code snippet
fix test cases and add support for code snippet

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