Hi,

Thanks for taking a look.
Afaict, the only difference between blank and [ \t] are some weird 
unicode characters.
It isn't clear to me which one should be preferable and in what 
situation. I couldn't find any reference to this in any documentation of 
Org syntax.

I've replaced all instances of blank with (any " \t") in this function 
(that's the only instances in org.el).
The attached patch fixes the original issue.

Regards,
Sébastien Miquel

Nicolas Goaziou wrote:

> Hello,
>
> Sebastien Miquel <sebastien.miquel91@orange.fr> writes:
>
>>   	   (rx bol (group (zero-or-more blank) "#"
>>   			  (group (group (or (seq "+" (one-or-more (any "a-zA-Z")) (optional ":"))
>> -					    space
>> +					    blank
> This looks wrong, but so does the current regexp. It should not be
> `space' nor `blank', but [ \t] per Org syntax.
>
> Regards,
>