use str, not tuple for seq
Merge pull request #2 from brentp/notuple

use str, not tuple for seq [skip ci]
Merge pull request #2 from brentp/notuple

use str, not tuple for seq [skip ci]
[test instanceof six.string_types, fix doctests @mdshw5]
Merge branch 'master' of https://github.com/mdshw5/pyfaidx
Remove debugging print function
fix __neg__ and remove vestigial usage of "".join(self.seq)