Fix arity and return value mismatches

`assert` returns every argument it is given, so `return assert(x, msg)`
was leaking the message as a second return value.

`get_tile` is documented as taking x and y. The async function class
declared `@operator call` with no parameters, which made every async
call look over supplied.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

exp_legacy/module/config/chat_reply.lua

@@ -24,6 +24,7 @@ local afk_time_units = {
 }
 
 return {
+    --- @type table<string, LocalisedString | fun(player: LuaPlayer, is_command: boolean): LocalisedString>
     messages = { --- @setting messages will trigger when ever the word is said
         ["discord"] = { "info.discord" },
         ["expgaming"] = { "info.website" },
@@ -66,6 +67,7 @@ return {
     command_admin_only = false, --- @setting command_admin_only when true will only allow chat commands for admins
     command_permission = "command/chat-commands", --- @setting command_permission the permission used to allow command prefixes
     command_prefix = "!", --- @setting command_prefix prefix used for commands below and to print to all players (if enabled above)
+    --- @type table<string, LocalisedString | fun(player: LuaPlayer, is_command: boolean): LocalisedString>
     commands = { --- @setting commands will trigger only when command prefix is given
         ["dev"] = { "exp_chat-auto-reply.reply-dev" },
         ["magic"] = { "exp_chat-auto-reply.reply-magic" },

exp_legacy/module/expcore/external.lua

@@ -50,7 +50,7 @@ local servers = External.get_servers()
 ]]
 function External.get_servers()
     assert(ext, "No external data was found, use External.valid() to ensure external data exists.")
-    return assert(ext.servers, "No server list was found, please ensure that the external service is running")
+    return (assert(ext.servers, "No server list was found, please ensure that the external service is running"))
 end
 
 --[[-- Gets a table of all the servers filtered by name, key is the server id, value is the server details
@@ -85,7 +85,7 @@ function External.get_current_server()
     assert(ext, "No external data was found, use External.valid() to ensure external data exists.")
     local servers = assert(ext.servers, "No server list was found, please ensure that the external service is running")
     local server_id = assert(ext.current, "No current id was found, please ensure that the external service is running")
-    return assert(servers[server_id], "No details found for server with id: " .. tostring(server_id))
+    return (assert(servers[server_id], "No details found for server with id: " .. tostring(server_id)))
 end
 
 --[[-- Gets the details of the given server
@@ -99,7 +99,7 @@ local server = External.get_server_details('eu-01')
 function External.get_server_details(server_id)
     assert(ext, "No external data was found, use External.valid() to ensure external data exists.")
     local servers = assert(ext.servers, "No server list was found, please ensure that the external service is running")
-    return assert(servers[server_id], "No details found for server with id: " .. tostring(server_id))
+    return (assert(servers[server_id], "No details found for server with id: " .. tostring(server_id)))
 end
 
 --[[-- Gets the status of the given server

exp_legacy/module/expcore/roles.lua

@@ -376,7 +376,7 @@ function Roles.get_player_highest_role(player)
         end
     end
 
-    return assert(highest, "Player has no roles")
+    return (assert(highest, "Player has no roles"))
 end
 
 --- Assignment.