errors.lean:4:0: error: unknown identifier 'a'
tst1 : ℕ → ℕ → ℕ
errors.lean:12:16: error: unknown identifier 'wth'
errors.lean:22:12: error: unknown identifier 'b'
tst3 : A → A → A
foo.tst1 : ℕ → ℕ → ℕ
foo.tst2 : ℕ → ℕ → ℕ
foo.tst3 : Π A, A → A → A