HTML Guide for comments

A bogus comment error occurs when an invalid or incorrectly formatted comment appears in HTML.

and cannot contain a double hyphen–except at the start and end. Bogus comments often result from mistakes like using a single hyphen, omitting angle brackets, or including–` in the comment body. Correct syntax: html <!-- This is a valid comment --> Incorrect example (causes a bogus comment error): html <! -- This is not valid -->