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-rw-r--r--guides/w3c_validator.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/guides/w3c_validator.rb b/guides/w3c_validator.rb
index 4671e040ca..f38b6c2639 100644
--- a/guides/w3c_validator.rb
+++ b/guides/w3c_validator.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
# ---------------------------------------------------------------------------
#
# This script validates the generated guides against the W3C Validator.