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-rw-r--r--lib/uri/ftp.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/uri/ftp.rb b/lib/uri/ftp.rb
index a90e9b20fd..e5c00b34da 100644
--- a/lib/uri/ftp.rb
+++ b/lib/uri/ftp.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
# = uri/ftp.rb
#
# Author:: Akira Yamada <akira@ruby-lang.org>