Re: icalendar.el bug fix patch

[Juri Linkov]

> I think text markers would make more sense, like
>
>    \(*FOO:REGEXP\)
>
> where FOO is the "syntax modifier".  This uses a similar syntax to the
> \(?..:REGEXP\) used for shy and named groups.

This makes sense since there are not too many possible modifiers:

https://www.regular-expressions.info/modifiers.html

It seems 'i' should override the value of 'case-fold-search'.

Another useful modifier to add would be 'm' that changes the meaning
of ‘^’ to ‘\`’ (or vice versa).