In equation environment, click the button `Insert plain text(Alt+$)`

. Type space twice to insert a quad space.

In preference > convert, turn on “Export mathematical formulas as MathJax” and export to HTML:

and open the exported HTML in browser. It displays as

The exported LaTeX code is `\displaystyle a \text{\quad a}`

Because MathJax doesn’t support text macros (See this issue) it output `\quad`

in `\text`

verbatim.

also with `\textbf,\textrm,\textit,\textup`

Macros inside `\mathrm`

such as `\quad`

will display properly:

`a \mathrm{\quad a}`

# Converted to html with MathJax

Here is probably also the case to submit a bug report at https://savannah.gnu.org/bugs/?group=texmacs