Command line with Python 3 does not work

[ThomasFaivre]

Hello!

I found this bug:

$ python3 bin/bugzilla help
  File "bin/bugzilla", line 37
    lambda (alias, target): "    {:20}{}".format(alias, target),
           ^
SyntaxError: invalid syntax
$ python3 --version
Python 3.4.2

I tried to fix this (it's a deeper issue than the syntax error), but I am not very familiar with the differences between Python 2.7 and Python 3...

Thanks!