I tried Atom on different PC’s with different keyboards. I’m never able to type a left bracket ( [ ). The right one is ok.
I use windows 7, with an Azerty-keyboard (Dutch configuration). The bracket is typed using Alt Gr + [ (on the key with ¨ & ^). Is this somehow disabled? I tried turning off my installed packages (open last project, remote sync & autoclose html), but that didn’t help.