From c13ade2aaef7390e760e28eb1acd780e6a5216a3 Mon Sep 17 00:00:00 2001
From: ydah <t.yudai92@gmail.com>
Date: Thu, 2 Jan 2025 21:20:48 +0900
Subject: [PATCH] Fix a warning for frozen string literal
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Just fixing following warning:
```
❯ RUBYOPT=-w bundle exec rake test
/ydah/racc/Rakefile:80: warning: literal string will be frozen in the future (run with --debug-frozen-string-literal for more information)
```
---
 Rakefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Rakefile b/Rakefile
index 5be8a492..a6b7df3a 100644
--- a/Rakefile
+++ b/Rakefile
@@ -77,7 +77,8 @@ else
   # MRI
   require "rake/extensiontask"
   extask = Rake::ExtensionTask.new "cparse" do |ext|
-    lib_dir = (ext.lib_dir << "/#{RUBY_VERSION}/#{ext.platform}/racc")
+    ext.lib_dir = ext.lib_dir + "/#{RUBY_VERSION}/#{ext.platform}/racc"
+    lib_dir = ext.lib_dir
     ext.ext_dir = 'ext/racc/cparse'
   end
 end