Wrong mime type for sh ?

[jbleyel]

puremagic.magic_file("name.sh")
[PureMagicWithConfidence(byte_match=None, offset=None, extension='.txt', mime_type='text/plain', name='ascii text, with LF line terminators', confidence=0.9)]

The shell script is not detected as shell.

Is this a bug?

Im using version 2.1.1