lua multi-line comments bug

[perlawk]

The original comment of lua in nerdcommenter is only '--' But there is a multiline comment style:

--[[
This is multiline
comments
]]

When I add is to the lua entry as 'lua': { 'left': '--[[', 'right': ']]', 'leftAlt': '--' }, or 'lua': { 'left': '--', 'leftAlt': '--[[', 'rightAlt':']]' }, single line comment is ok. multi-line comment is ok too. But when uncomment the multiline comment like the above [[ This is multiline comments

The '[[' is not removed. I think this is a bug in the Nerdcommenter, This there is seldom comment style use the same left beginning symbol as in Lua '--', that make the uncomment function not working properly. Thanks for anyone can fix this bug.

[alerque]

@perlawk If by chance you still work in Lua and use VIM, could you check out @kevinhwang91's fix for this is #451? I'm pretty sure it should be a direct fix but it would be nice to have confirmation that it does what is expected of it.