Implement Slk Attributes, fix some error messages and fix formatting on constant godoc
Implement Slk Attributes, fix some error messages and fix formatting on constant godoc

nodar-chkuaselidze/goncurses,cha87de/goncurses,snuk182/goncurses,aquarat/goncurses,bluzye/goncurses,cha87de/goncurses,nodar-chkuaselidze/goncurses,snuk182/goncurses,cha87de/goncurses,aquarat/goncurses,bluzye/goncurses