fix: sparse Array usage in Array.extend

[hjpalpha]

Summary

How did you test this change?

dev

[mbergen]

LGTM besides comment

[ElectricalBoy]

Lua-Modules/lua/wikis/leagueoflegends/GetMatchGroupCopyPaste/wiki.lua

Lines 48 to 53 in a79feca

	Logic.readBool(args.hasDate) and {
	INDENT .. '|date=',
	INDENT .. '|twitch= |youtube=',
	(Logic.readBool(args.reddit) and INDENT .. '|reddit= |gol=' or nil),
	INDENT .. '|mvp='
	} or nil,

would also need to fix sparse array here too