Use return values in `player_part.lua`.

Also minor style fixes.

player_part.lua

@@ -4,20 +4,18 @@
 
 function irc:player_part(name)
 	if not self.joined_players[name] then
-		minetest.chat_send_player(name, "IRC: You are not in the channel.")
-		return
+		return false, "You are not in the channel"
 	end
 	self.joined_players[name] = nil
-	minetest.chat_send_player(name, "IRC: You are now out of the channel.")
+	return true, "You left the channel"
 end
  
 function irc:player_join(name)
 	if self.joined_players[name] then
-		minetest.chat_send_player(name, "IRC: You are already in the channel.")
-		return
+		return false, "You are already in the channel"
 	end
 	self.joined_players[name] = true
-	minetest.chat_send_player(name, "IRC: You are now in the channel.")
+	return true, "You joined the channel"
 end
 
 
@@ -25,7 +23,7 @@ minetest.register_chatcommand("join", {
 	description = "Join the IRC channel",
 	privs = {shout=true},
 	func = function(name, param)
-		irc:player_join(name)
+		return irc:player_join(name)
 	end
 })
  
@@ -33,7 +31,7 @@ minetest.register_chatcommand("part", {
 	description = "Part the IRC channel",
 	privs = {shout=true},
 	func = function(name, param)
-		irc:player_part(name)
+		return irc:player_part(name)
 	end
 })
  
@@ -41,11 +39,13 @@ minetest.register_chatcommand("who", {
 	description = "Tell who is currently on the channel",
 	privs = {},
 	func = function(name, param)
-		local s = ""
-		for name, _ in pairs(irc.joined_players) do
-			s = s..", "..name
+		local out, n = { }, 0
+		for name in pairs(irc.joined_players) do
+			n = n + 1
+			out[n] = name
 		end
-		minetest.chat_send_player(name, "Players On Channel:"..s)
+		table.sort(out)
+		return true, "Players in channel: "..table.concat(out, ", ")
 	end
 })
 
@@ -62,7 +62,7 @@ minetest.register_on_leaveplayer(function(player)
 end)
 
 function irc:sendLocal(message)
-        for name, _ in pairs(self.joined_players) do
+	for name, _ in pairs(self.joined_players) do
 		minetest.chat_send_player(name, message)
 	end
 	irc:logChat(message)