Duplicate initial character to prevent FrozenError

sferik · sferik · commit 352d3d068e75 · 2025-07-22T06:36:51.000-07:00
diff --git a/lib/unicode_normalize/normalize.rb b/lib/unicode_normalize/normalize.rb
@@ -115,7 +115,7 @@ def self.nfc_one(string)
       end
     end
 
-    result = start
+    result = start.dup
     until accents.empty?
       start = accents[0]
       last_class = CLASS_TABLE[start]-1
