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-rw-r--r--lib/rdoc/generator/json_index.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/rdoc/generator/json_index.rb b/lib/rdoc/generator/json_index.rb
index 5318b4cc57..90c68f91a1 100644
--- a/lib/rdoc/generator/json_index.rb
+++ b/lib/rdoc/generator/json_index.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'json'
begin
require 'zlib'