Run gofmt on session.go

[scottmmjackson]

Ran a gofmt checker across the repo and session.go popped up.

After this change, the entire repo should be consistently gofmtted.

https://golang.org/misc/git/pre-commit - useful for contributors

https://github.com/google/gopacket/blob/master/.travis.gofmt.sh - could be a good way to enforce gofmt in travis

[coveralls]

Coverage remained the same at 94.385% when pulling 57f282d on scottmmjackson:sj-gofmt into 7e107b4 on igm:master.

[coveralls]

Coverage remained the same at 94.385% when pulling 57f282d on scottmmjackson:sj-gofmt into 7e107b4 on igm:master.

[igm]

Thanks @scottmmjackson for pointing this out. The gofmt behaviour has changed in 1.11 (see golang/go#26228). So I assume you are using >1.11 and that's why you see the difference in formatting and the last commit of that file was before 1.11.

I'm not 100% sure about pre-commit hook as it depends on go version the user is using on the machine, but travis check seems fine. So could you please include travis CI config file update in this PR so that we use 1.12 together with gofmt?

[scottmmjackson]

Will do, busy day at work so I'll try to get around to it this afternoon EST