Shift-Option- is adding accented characters On El Capitan (10.11.4) I somehow got into a state where using the key combination shift+option+key outputs accented or special characters.  For example

shift+option+k : 
shift+option+j : Ô

I have those key combos mapped to some useful commands in my text editor (RubyMine/IntelliJ), but instead of those commands working, I now just get the special character input.  I assume it must be a built in OS X option (I've tried various keyboards) but I can't find any way to disable it.   Any ideas?
In order to avoid accented characters you need to create and use a custom keylayout file.  I followed the steps outlined here:

https://stackoverflow.com/questions/11876485/how-to-disable-typing-special-characters-when-pressing-option-key-in-mac-os-x/24100077#24100077