Revert "(vim) vimfiler ならば行末の空白をハイライトしない。"

This reverts commit 7b26f2b846136711a24578210158bae8ef3d5a58.
Revert "(vim) add vim-precious"

This reverts commit b1324479960f435742ed68c3293ab319a1c2f0ec.
(vim) context_filetype.vim