attribute accessor named "raw" misstaken for unsafe method

[RobertDober]

10:06 % rubocop -V                                                                                                                                                                              2016-07-06 10:06:40
0.41.1 (using Parser 2.3.1.2, running on ruby 2.3.1 x86_64-linux)
robert@rd ~/facilecomm/facilecomm_v2 (rd/FCV-1231/upgrade_rubocop✗)   (ruby-2.3.1@facilecomm_v2), node-5.10.1
10:06 % cat xxx.rb                                                                                                                                                                              2016-07-06 10:06:53
# frozen_string_literal: true
class M
  attr_reader :raw
  def a
    puts raw
  end
end
robert@rd ~/facilecomm/facilecomm_v2 (rd/FCV-1231/upgrade_rubocop✗)   (ruby-2.3.1@facilecomm_v2), node-5.10.1
10:07 % rubocop -a xxx.rb                                                                                                                                                                       2016-07-06 10:07:02
Inspecting 1 file
C

Offenses:

xxx.rb:5:10: C: Tagging a string as html safe may be a security risk, \
          prefer safe_join or other Rails tag helpers instead
    puts raw
         ^^^

1 file inspected, 1 offense detected

[bbatsov]

Yeah, we should check whether raw was passed some params.