HTML Guide
A bogus comment error occurs when an invalid or incorrectly formatted comment appears in HTML.
HTML comments must use the syntax <!-- comment text --> 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:
<!-- This is a valid comment -->Incorrect example (causes a bogus comment error):
<! -- This is not valid -->Learn more: