Weird error message in Layout/IndentHeredoc: "<<~ instead of <<~"

[herwinw]

Using the following rubocop config:

AllCops:
  TargetRubyVersion: 2.3

And this test script:

# frozen_string_literal: true

var = <<~TXT
 foobar
TXT
puts var

"foobar" is indented with a single space.
The following error message is shown:

heredoc.rb:4:1: C: Layout/IndentHeredoc: Use 2 spaces for indentation in a heredoc by using <<~ instead of <<~.
 foobar ...
^^^^^^^

The part about using <<~ instead of <<~ doesn't really make much sense.

$ rubocop -V
0.52.1 (using Parser 2.4.0.2, running on ruby 2.3.3 i386-linux-gnu)

[pocke]

#4662 (comment)
It is already mentioned in the issue. Unfortunately it has not been fixed yet 😿

[fullofcaffeine]

+1