We should maybe add more common magic sequences to filetype.rs?
Also for really unknown files, we should maybe capture the first 8 (?) bytes (change [Unknown](https://github.com/bovee/entab/blob/f4e0f3cb7ca4383145cd3575a0e80962d07dcdee/entab/src/filetype.rs#L79) to Unknown([u8; 8])?) and then rewrite the error message appropriately.
We should maybe add more common magic sequences to
filetype.rs
?Also for really unknown files, we should maybe capture the first 8 (?) bytes (change
[Unknown](https://github.com/bovee/entab/blob/f4e0f3cb7ca4383145cd3575a0e80962d07dcdee/entab/src/filetype.rs#L79)
toUnknown([u8; 8])
?) and then rewrite the error message appropriately.