dup whitelist before modification

Fixes ActionView::Template::Error (can't modify frozen Hash) #48415

dup whitelist before modification
Fixes ActionView::Template::Error (can't modify frozen Hash) #48415
89bffe08 · Pirate Praveen · 99e816bc · 89bffe08
Commit 89bffe08 authored Jun 30, 2018 by Pirate Praveen
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lib/banzai/filter/sanitization_filter.rb lib/banzai/filter/sanitization_filter.rb +1 -1

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--- a/lib/banzai/filter/sanitization_filter.rb
+++ b/lib/banzai/filter/sanitization_filter.rb
@@ -8,7 +8,7 @@ module Banzai
      TABLE_ALIGNMENT_PATTERN = /text-align: (?<alignment>center|left|right)/

      def whitelist
-        whitelist = super
+        whitelist = super.dup

        customize_whitelist(whitelist)