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-rw-r--r--lib/banzai/filter/table_of_contents_filter.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/banzai/filter/table_of_contents_filter.rb b/lib/banzai/filter/table_of_contents_filter.rb
index f2ae17b44fa..1a68d773048 100644
--- a/lib/banzai/filter/table_of_contents_filter.rb
+++ b/lib/banzai/filter/table_of_contents_filter.rb
@@ -17,7 +17,7 @@ module Banzai
# :toc - String containing Table of Contents data as a `ul` element with
# `li` child elements.
class TableOfContentsFilter < HTML::Pipeline::Filter
- PUNCTUATION_REGEXP = /[^\p{Word}\- ]/u
+ PUNCTUATION_REGEXP = /[^\p{Word}\- ]/u.freeze
def call
return doc if context[:no_header_anchors]