From d941a7db0ec6dd5faa77c6f2e0f697cf5f178076 Mon Sep 17 00:00:00 2001
From: Laura Radville <radville@github.com>
Date: Thu, 5 Sep 2024 10:11:32 -0400
Subject: [PATCH] marks strings as mutable

---
 lib/bert/decode.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/bert/decode.rb b/lib/bert/decode.rb
index c1d7bbe..fa67b9f 100644
--- a/lib/bert/decode.rb
+++ b/lib/bert/decode.rb
@@ -31,7 +31,7 @@ module BERT
 
     def initialize(ins)
       @in = ins
-      @peeked = ""
+      @peeked = +""
     end
 
     def read_any
@@ -66,7 +66,7 @@ module BERT
         length = 0
       else
         result = @peeked
-        @peeked = ''
+        @peeked = +''
         length -= result.length
       end