# What does the sentence below, which is only visible in the edit mode of an answer I gave, mean?

In this answer I posted there is a "sentence" visible when you look at the end of the edit version of the answer (visible when you "push" the "edit button" below the answer). The sentence isn't visible in the answer itself though. The sentence can't be put here and be shown in my question by putting it in a quote form, by copy and paste or by just typing it. This is the sentence I mean:

<!-- The 6-character limit is plain stupid. Next poster, please remove this -->


My question may be obvious: why has this sentence been added to my answer in the edit mode. What does it mean?

That's a comment, using the meaning of the word from the context of programming. I can't find anything about that in the editing help page, but it's a standard HTML technique which is supported in Markdown. <!--stuff--> is a simple comment; if I remove the backticks from the markdown to get rid of the code formatting, it won't show up in the content.