How To Add Double-Dash / Hyphen in WordPress

WordPress in its infinite wisdom consumes one dash ( - ) and converts the other when there are two consecutive dashes like this: --. The solution is to use - twice instead of dash. - is the HTML escape sequence for a dash or hyphen or minus sign.

This ASCII character is a generic, multipurpose character, and one can say that in ASCII hyphen and minus are identical. But in Unicode, there are distinct characters named “hyphen” and “minus sign” (as well as different dash characters). For compatibility, the old ASCII character is preserved in Unicode, too (in the old code position, with the name hyphen-minus).