RuntimeError: can't modify frozen String
https://sentry.gitlab.net/gitlab/gitlabcom/issues/571332/
RuntimeError: can't modify frozen String
html/tokenizer.rb:26:in `encode!'
text.encode!
html/tokenizer.rb:26:in `initialize'
text.encode!
html/sanitizer.rb:19:in `new'
tokenizer = HTML::Tokenizer.new(text)
html/sanitizer.rb:19:in `tokenize'
tokenizer = HTML::Tokenizer.new(text)
html/sanitizer.rb:10:in `sanitize'
tokenize(text, options).join
...
(166 additional frame(s) were not displayed)
RuntimeError: can't modify frozen String