block comment delimiters are in the documentation

[mariusz-kowalski]

If I use block comment, =begin and =end delimiters are part of the documentation, and they are interpreted as headings h1:

example_class.rb

=begin
This is documentation
=end
class ExampleClass; end

This

rdoc example_class.rb

will generate the documentation with heading (h1) "begin" at the beginning and heading "end" at the end.

<h1 id="class-ExampleClass" class="class">
  class ExampleClass
</h1>
<section class="description">
  <h1 id="class-ExampleClass-label-begin">
    begin
    <span><a href="#class-ExampleClass-label-begin">¶</a> <a href="#top">↑</a></span>
  </h1>

  <p>This is documentation</p>

  <h1 id="class-ExampleClass-label-end">
    end
    <span><a href="#class-ExampleClass-label-end">¶</a> <a href="#top">↑</a></span>
  </h1>
</section>

=begin and =end are just comment delimiters and should not be a part of the documentation.

I'm using version 6.0.1 (ruby 2.5)

[topofocus]

Same feature here.
Is there a known walk around?

Worst: »begin» and »end» are included in /rdoc/table_of_contents.html#classes