[tex4ht] spaces in math

[Tomas Davidek]

Dear all,

     I noticed a strange feature. Sometimes, the math spacing does not 
work well. A typical case

=====

\newcommand{\mev}{\ifmmode \mathrm{MeV}\else MeV\fi}

Svislými čarami jsou označeny dopplerovské meze $E_1 = (53{,}6\pm 
2{,}8)~\mev$.

=====

Of course in pdflatex everything works well, but in some cases the 
tex4ht results in no space between the number and the unit. I very often 
use the form $X = 88~\mev$. In most cases the expression is translated 
correctly to HTML, but sometimes it fails.

I picked some cases from my large document and entered affected 
sentences in the attached document. If I compile it now with make4ht, 
everything displays correctly.

Does anyone have an idea what could be wrong and how to systematically 
avoid this kind of problem, please? Of course it may help to 
systematically write $X = 88\ \mev$ or $X = 8$~{\mev}, but this would 
requite quite a lot of manual work....

Thanks a lot for any hint.

Cheers,

                    Tomas

-------------- next part --------------
A non-text attachment was scrubbed...
Name: tilde.tex
Type: text/x-tex
Size: 1282 bytes
Desc: not available
URL: <https://tug.org/pipermail/tex4ht/attachments/20210210/38d71fc0/attachment.bin>