Tags h4, h5, h6 in the comments

When we write comments, we are told: “by the way, you can use html-tags”. The last word is a link. We click, we look, that for tags. The first in the standard section - h4, h5, h6. We try. It does not come out, the usual paragraph (more precisely, the line with hyphenation) is obtained from the title text.

You might think that these tags work only in posts, and help is common for posts and comments. But this is not the case, for posts there is a hint, there is a habracut, for example, which is not shown in the hint for comments. In general, the help to the comments should be creatively reworked and reduced. It seems that hr still needs to be removed.