the output about version code looks "wrong"

[rsyanting]

hi~

I'm using the v1.8.0 on Windows 10 (64 bit version) .

when I query some domain, the output is like this:

dnslookup v. v1.8.0
dnslookup result:
;; opcode: QUERY, status: NOERROR, id: 36470
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

it seems there was some extra chars like v. in the output message

please check it and close the PR