Constant project_init::includes::LIB

pub const LIB: &'static str = "module Lib\n    ( exec\n    , head\'\n    ) where\n\nhead\' :: [a] -> Maybe a\nhead\' []    = Nothing\nhead\' (x:_) = Just x\n\nexec :: IO ()\nexec = putStrLn \"{{ project }} from template\"\n"