add twenty instance type

WeakAuras/BuffTrigger2.lua

@@ -2141,7 +2141,7 @@ function BuffTrigger.Add(data)
       end
 
       local groupTrigger = trigger.unit == "group" or trigger.unit == "raid" or trigger.unit == "party"
-      local effectiveIgnoreSelf = groupTrigger  and trigger.ignoreSelf
+      local effectiveIgnoreSelf = groupTrigger and trigger.ignoreSelf
       local effectiveClass = groupTrigger and trigger.useClass and trigger.class
       local effectiveIgnoreDead = groupTrigger and trigger.ignoreDead
       local effectiveIgnoreDisconnected = groupTrigger and trigger.ignoreDisconnected

WeakAuras/Types.lua

@@ -1728,6 +1728,7 @@ WeakAuras.instance_types = {
   none = L["No Instance"],
   party = L["5 Man Dungeon"],
   ten = L["10 Man Raid"],
+  twenty = L["20 Man Raid"],
   twentyfive = L["25 Man Raid"],
   fortyman = L["40 Man Raid"],
   pvp = L["Battleground"],

WeakAuras/WeakAuras.lua

@@ -1913,6 +1913,8 @@ local function GetInstanceTypeAndSize()
     if Type == "raid" then
       if maxPlayers == 10 then
         size = "ten"
+      elseif maxPlayers == 20 then
+        size = "twenty"
       elseif maxPlayers == 25 then
         size = "twentyfive"
       elseif maxPlayers == 40 then