From 7be1254307a177300bfd8d3ba2eb120064f0ac67 Mon Sep 17 00:00:00 2001
From: "Y. Wang" <yw05@forksworld.de>
Date: Mon, 18 Mar 2024 02:05:14 +0100
Subject: Minor: str:sub -> string.sub for consistency with the rest of the
 code

---
 advtrains/poconvert.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/advtrains/poconvert.lua b/advtrains/poconvert.lua
index 3075282..74f962e 100644
--- a/advtrains/poconvert.lua
+++ b/advtrains/poconvert.lua
@@ -13,7 +13,7 @@ do
 	local function replace_single(pfx, c)
 		local pl = #pfx
 		if pl % 2 == 0 then
-			return pfx:sub(1, pl/2) .. c
+			return string.sub(pfx, 1, pl/2) .. c
 		end
 		return string.sub(pfx, 1, math.floor(pl/2)) .. (schartbl[c] or c)
 	end
-- 
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