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-rw-r--r--guides/w3c_validator.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/guides/w3c_validator.rb b/guides/w3c_validator.rb
index 4671e040ca..a97599ad3b 100644
--- a/guides/w3c_validator.rb
+++ b/guides/w3c_validator.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
# ---------------------------------------------------------------------------
#
# This script validates the generated guides against the W3C Validator.