TLDR

Someone asked for the documentation that will be sent alongside our software releases. Some clients require specific documentation. A Manager responds, attaching a couple of documents. I have a look at them to see what the deal is.

One of them began like this:

Summary
TLDR The software is tested using the following ...

“Too Long Didn’t Read”? In a formal document sent out to customers!? Really? I really hope we actually haven’t sent that yet, and this was just in draft stage.

TLDR is the extremely informal way of saying “Summary” so why is it included in a Summary section? It’s a redundant phrase and definitely not appropriate for the context.