Given a gemspec like this:

  Spec.new do |s|
    s.version = "0.1.0"
    s.post_install_message = <<~DESCRIPTION.strip.downcase
      My description
    DESCRIPTION
  end

The sanitized output should look like this:

  Spec.new do |s|
    s.version = "0.1.0"
    "sanitized"
  end

But it actually looks like this:

  Spec.new do |s|
    s.version = "0.1.0"
    "sanitized"
      My description
    DESCRIPTION
  end

I'll look into a fix for this bug in a follow-up commit.

Co-authored-by: Philip Harrison <feelepxyz@github.com>

…chains

…specs-with-heredocs-with-method-chains