Read _Ed Mastery_ last night. Didn't actually do the exercises. 😉

I've messed around with a lot of retrocomputers and used a lot of line editors, many of them called ed. What sets real UNIX ed(1) apart is the regexps.

regexps are one of those 3 edged swords, however. They can bite back!

I have used ed a little, and this taught me more about it!

@mwlucas