Archive copy of the "slides", etc. from this Tuesday's meeting: Michael Paoli: sed - Streaming EDitor+ are available here: https://www.archive.balug.org/2021/2021-03-16/ The "slides" are in Libre Office Impress format.
Eratta?! 8-O I did find at least one item that wasn't on the "slides" and should've been. For latest version(s), may also want to peek at: https://www.mpaoli.net/~michael/unix/sed/ which will likely be getting updated soon (but that location above may not be as persistent or available as the BALUG archive location/copy). The URL above is also linked to from the archived "slide" set.