Re: [PATCH v4 0/3] doc: introducing synopsis para

Josh Steadmon [off-list ref] writes:

quoted

I checked my High Sierra installation (macOS 10.13) which is even
older than Big Sur (macOS 11), and High Sierra's "sed" also
understands -E.

Hi folks, sorry for the false alarm and the delayed response. For some
reason our build environment has a >decade old version of sed. I'm still
tracking down why that is, but please do not hold back this topic any
longer due to our out-of-date-ness. Sorry again!

Thanks.

I think Jean-Noël's latest rewrote ERE down to BRE but also tweaked
something else around U+2026 …. Please try that version again when
you have a chance.