Gem::Text#clean_text

# File tmp/rubies/ruby-4.1.0-preview1/lib/rubygems/text.rb, line 10
def clean_text(text)
  text = text.gsub(/[\000-\b\v-\f\016-\037\177]/, ".")

  # Match C1 control characters (U+0080-U+009F) as codepoints. This requires
  # a valid UTF-8 string so the regexp does not split a multibyte sequence;
  # strings in other encodings are left unchanged.
  if text.encoding == Encoding::UTF_8 && text.valid_encoding?
    text = text.gsub(/[\u0080-\u009f]/, ".")
  end

  text
end