Josh Steadmon <steadmon@xxxxxxxxxx> writes: >> 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 longer due to our out-of-date-ness.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.