Fix parameter display in Lua ref guide
Fix parameter display in Lua ref guide

When the parameter are not passed between parenthesis (ie. {...} or
[index]), the display was not correct in the doc.

lcheylus/haka,nabilbendafi/haka,haka-security/haka,Wingless-Archangel/haka,Wingless-Archangel/haka,lcheylus/haka,haka-security/haka,LubyRuffy/haka,LubyRuffy/haka,lcheylus/haka,nabilbendafi/haka,nabilbendafi/haka,haka-security/haka