Clean up /xp syntax help

mods/HUD/mcl_experience/init.lua

@@ -472,7 +472,7 @@ minetest.register_entity("mcl_experience:orb", {
 
 minetest.register_chatcommand("xp", {
 	params = S("[<player>] [<xp>]"),
-	description = S("Gives [[player <player>] <xp>] XP"),
+	description = S("Gives a player some XP"),
 	privs = {server=true},
 	func = function(name, params)
 		local player, xp = nil, 1000

mods/HUD/mcl_experience/locale/mcl_experience.ru.tr

@@ -1,5 +1,5 @@
 [<player>] [<xp>]=[<игрок>] [<xp>]
-Gives [[player <player>] <xp>] XP=Даёт [[игроку <игрок> [<xp>]] единиц опыта XP
+Gives a player some XP=
 Error: Too many parameters!=Ошибка: слишком много параметров!
 Error: Incorrect value of XP=Ошибка: Недопустимое значение XP
 Error: Player not found=Ошибка: Игрок не найден

mods/HUD/mcl_experience/locale/template.txt

@@ -1,5 +1,5 @@
 [<player>] [<xp>]=
-Gives [[player <player>] <xp>] XP=
+Gives a player some XP=
 Error: Too many parameters!=
 Error: Incorrect value of XP=
 Error: Player not found=