Fixed BattleNet tag can contain spaces when it shouldn't

Device: PC
Browser: Chrome
OS: Windows 10

Steps to reproduce:
- post1269785.html#p1269785
- Click the button to copy BattleNet tag
- Paste it in Bnet client or anywhere else
-> the space between name and hash prevents it from being correctly parsed by the client

Anything else to add:
Now that I think about it it is probably an error from the user rather than a website bug, therefore a suggested fix would be to either improve the regex used for validating the Bnet field (if there is) or trim any space before saving. But should be very low prio either way.