" Custom conceal
" syntax region todolist  start="^\s*[\+-\*x ]" end="\s" contained keepend

syntax match markdownConceal "\[\ \]" conceal cchar=󰄱
syntax match markdownConceal "\[x\]"  conceal cchar=󰰰
syntax match markdownConceal "\[v\]"  conceal cchar=󰄵
syntax match markdownConceal "*"      conceal cchar=
syntax match markdownConceal "-"      conceal cchar=
syntax match markdownConceal "+"      conceal cchar=

syntax region 
       \ markdownItemization
       \ start="^\s*\(\[ \]\|[\+\-\*x]\)\s"
       \ end="\s"
       \ contains=markdownConceal


hi def link markdownConceal Todo
hi! link Conceal Text