Weird unicode characters prevent event tag to be recognized

[ZephyrRaine]

Hello, we detected this bug during our event games (The Shell) for SITS community.
In some instances, when the league tag (#vagueX) is parsed from the title, it will be ignored by OSR if it contains invisible unicode characters.

You'll find attached two .sgf games where this bug occurs, (notice the GN parameter of the sgf).

At first glance from @climu it looks like making this line escape more characters should work, by using .isascii() for instance :

l.142 of /league/utils.py

Thank you!

46215909-180-Tigrou49-Gruts(1).txt
46523679-177-Gruts-Leight(1).txt