Changing test_existence_args default to array instead of tuple.
Changing test_existence_args default to array instead of tuple.

biodamasceno/SublimeLinter-for-ST2,benesch/sublime-linter,uschmidt83/SublimeLinter-for-ST2,benesch/sublime-linter,SublimeLinter/SublimeLinter-for-ST2,SublimeLinter/SublimeLinter-for-ST2,uschmidt83/SublimeLinter-for-ST2,tangledhelix/SublimeLinter-for-ST2,tangledhelix/SublimeLinter-for-ST2,biodamasceno/SublimeLinter-for-ST2