Might I suggest a new title as “GNU sed” doesn’t really say enough - perhaps “Learn by Example - GNU sed”?
Believe it or not, title editorializing is against Lobsters rules. But I agree with you. (Never have been a fan of that rule, and I break it constantly)
I think you might be confusing it with Hacker News rules. The lobste.rs rules don’t say anything about titles.
Hm, you’re right. I think I was just remembering angersock’s opinion.
I don’t think this case qualifies as editorialising though - IMHO, it’s an example of tidying up the title (much as we adopt the convention of removing site names from article titles and appending the year of publication if it’s not the current year).