case data do else if implementation
in infixl infixr interface let
module of then where
----------------------------------------------------
[
["keyword", "case"], ["keyword", "data"], ["keyword", "do"],
["keyword", "else"], ["keyword", "if"], ["keyword", "implementation"],
["keyword", "in"], ["keyword", "infixl"], ["keyword", "infixr"],
["keyword", "interface"], ["keyword", "let"], ["keyword", "module"],
["keyword", "of"], ["keyword", "then"], ["keyword", "where"]
]
----------------------------------------------------
Checks for some keywords.
