Bug: Line numbers and unexpected characters are off-by-one

[cognivore]

Why?

Given a parser string "yat" <*> string "ima" and an input "yatimAaaa!", we get the following error:

We should get an error at 1:4 instead.

How?

• [ ] See how ref implementation handles it
• [ ] Most likely, add 1 to line and col while printing.