docs: Fix typo on Chisel User Guide
chisels: Various small fixes to chisels

* spy_users: Add a space after the username to make output more
readable
* spy_ip: Update -T to -A in description to be in line with bef6091
* spy_port: Update -T to -A in description to be in line with bef6091
Merge pull request #150 from Erethon/master

Typo fixes and chisel description updates