From 62e9d25f6bf90ff050395d2fa4594303cc20b877 Mon Sep 17 00:00:00 2001
From: Niklas Mohrin <dev@niklasmohrin.de>
Date: Sat, 28 Mar 2026 22:53:49 +0100
Subject: [PATCH] Add regression test

---
 src/formatter.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/formatter.rs b/src/formatter.rs
index 1b504dd..fb7e512 100644
--- a/src/formatter.rs
+++ b/src/formatter.rs
@@ -433,5 +433,12 @@ mod tests {
                 ],
             );
         }
+
+        #[test]
+        /// Regression test for https://github.com/tealdeer-rs/tealdeer/issues/473
+        fn prefix_check_character_boundary() {
+            assert_eq!("Ä".len(), 2);
+            assert_eq!(run("", r#"Äxx{{x}}"#), [NormalCode("Äxx"), Variable("x")],);
+        }
     }
 }