Code review comment for lp://staging/~elopio/snapcraft/log_handler-2

> Wouldn't it make more sense to have an argument to the info() call (maybe
> provided by a subclassed Logger class from snapcraft.log)?

That was my first approach, extending the Format class. But then it breaks the original behaviour, where all the args and kwars passed will be used to create the string. Like:
logger.info('test {} {var}', 'v1', var='v2')

If you prefer handling the arguments ourselfs, I can easily revert.