Arrow designs for signs in Minecraft?

Nothing that's for copying and pasting, it needs to be something you could type with a regular keyboard. I had a design that went like this: ---->---->----> But there's a bug now making the signs pop off if dashes and arrows are on the bottom line (Only on the server I play on). Using spaces look kinda ugly and it's harder to tell if you got the right amount in there.

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