Add some more translation tags (overlooked or difficult)

M  mods/default/craftitems.lua
M  mods/default/nodes.lua
M  mods/doors/init.lua

mods/default/craftitems.lua

@@ -243,8 +243,8 @@ minetest.register_craftitem("default:skeleton_key", {
 			local new_stack = ItemStack("default:key")
 			local meta = new_stack:get_meta()
 			meta:set_string("secret", secret)
-			meta:set_string("description", "Key to "..user:get_player_name().."'s "
+			meta:set_string("description", S("Key to @1's @2", user:get_player_name(),
-				..minetest.registered_nodes[node.name].description)
+				minetest.registered_nodes[node.name].description))
 
 			if itemstack:get_count() == 0 then
 				itemstack = new_stack

mods/default/nodes.lua

@@ -2511,8 +2511,6 @@ local function update_bookshelf(pos)
 	if n_written + n_empty == 0 then
 		meta:set_string("infotext", S("Empty Bookshelf"))
 	else
---		meta:set_string("infotext", "Bookshelf (" .. n_written ..
---			" written, " .. n_empty .. " empty books)")
 		meta:set_string("infotext", S("Bookshelf (@1 written, @2 empty books)", n_written, n_empty))
 	end
 end

mods/doors/init.lua

@@ -417,7 +417,7 @@ function doors.register(name, def)
 				meta:set_string("key_lock_secret", secret)
 			end
 
-			return secret, "a locked door", owner
+			return secret, S("a locked door"), owner
 		end
 		def.node_dig_prediction = ""
 	else
@@ -615,7 +615,7 @@ function doors.register_trapdoor(name, def)
 				meta:set_string("key_lock_secret", secret)
 			end
 
-			return secret, "a locked trapdoor", owner
+			return secret, S("a locked trapdoor"), owner
 		end
 		def.node_dig_prediction = ""
 	else