URI._encode_uri_component

# File tmp/rubies/ruby-3.4.1/lib/uri/common.rb, line 406
def self._encode_uri_component(regexp, table, str, enc)
  str = str.to_s.dup
  if str.encoding != Encoding::ASCII_8BIT
    if enc && enc != Encoding::ASCII_8BIT
      str.encode!(Encoding::UTF_8, invalid: :replace, undef: :replace)
      str.encode!(enc, fallback: ->(x){"&##{x.ord};"})
    end
    str.force_encoding(Encoding::ASCII_8BIT)
  end
  str.gsub!(regexp, table)
  str.force_encoding(Encoding::US_ASCII)
end