https://git.ruby-lang.org/ruby.git/commit/?id=638c72e162

From 638c72e162f1a478578c61bbbdf643e66058f62f Mon Sep 17 00:00:00 2001
From: aycabta <aycabta@g...>
Date: Mon, 9 Aug 2021 20:35:41 +0900
Subject: [ruby/rdoc] Use single quote in Gemfile

https://github.com/ruby/rdoc/commit/e4b68d414c
---
 lib/rdoc/Gemfile | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/lib/rdoc/Gemfile b/lib/rdoc/Gemfile
index 4813c63..83a4863 100644
--- a/lib/rdoc/Gemfile
+++ b/lib/rdoc/Gemfile
@@ -3,10 +3,10 @@ source 'https://rubygems.org' https://github.com/ruby/ruby/blob/trunk/lib/rdoc/Gemfile#L3
 gemspec
 
 group :development do
-  gem "rake"
-  gem "racc", "> 1.4.10"
-  gem "kpeg"
-  gem "test-unit"
-  gem "minitest" # for test_rdoc_rubygems_hook.rb
-  gem "rubocop"
+  gem 'rake'
+  gem 'racc', '> 1.4.10'
+  gem 'kpeg'
+  gem 'test-unit'
+  gem 'minitest' # for test_rdoc_rubygems_hook.rb
+  gem 'rubocop'
 end
-- 
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