let double_right_arrow = "⇒"
let combining_overbar = "\204\133"
let combining_underbar = "\204\178"
let double_right_arrow = "⇒"
let combining_overbar = "\204\133"
let combining_underbar = "\204\178"
let pp_strike = ppf strike
let pp_subscript = ppf subscript
let pp_superscript = ppf superscript
let pp_strike = ppf strike
let pp_subscript = ppf subscript
let pp_superscript = ppf superscript