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-rw-r--r--advtrains_interlocking/ars.lua2
1 files changed, 1 insertions, 1 deletions
diff --git a/advtrains_interlocking/ars.lua b/advtrains_interlocking/ars.lua
index b3065ee..eb10497 100644
--- a/advtrains_interlocking/ars.lua
+++ b/advtrains_interlocking/ars.lua
@@ -52,7 +52,7 @@ function il.ars_to_text(arstab)
end
function il.text_to_ars(t)
- if t=="" then
+ if not string.match(t, "%S+") then
return nil
elseif t=="*" then
return {default=true}