dotfiles/.config/nvim/after/syntax/r.vim

syntax region rFold start="#.\{-}[-=]\{4,}" end="\n\ze\n#.\{-}[-=]\{4,}" fold transparent keepend
syntax match pipe1 contained "%" conceal cchar=| containedin=pipe
syntax match pipe2 contained ">%" conceal cchar=> containedin=pipe
syntax match pipe "%>%" contains=pipe1,pipe2
syntax match mul "*" conceal cchar=×
syntax match in "%in%" conceal cchar=∈

setlocal conceallevel=2