I wanted to add support for `` and <> pairs, which I've added and then ran into a problem when deleting the closing counterpart after triggering the insertion, e.g. pressing "(" and then del. This should be fixed/improved now. Another issue I've found is '"=>', which will become '"="' instead of the expected "=>". I've started debugging this, but then jumped ship to another autoclose plugin (https://github.com/Townk/vim-autoclose/), which works better for me. I just wanted to provide you the work I've done so far, in case you're interested. Thanks - also for the vt100-cursor-keys fix, which I've ported!