I'm still retyping stuff from stack overflow instead of copying. I find it really effective to really think through the code you're borrowing from somewhere — because once it's committed under your name, you're the one responsible for it.
As Morpheus said, “Time is always against us”.. so I just made sure it followed our coding standards, checked the test cases, and moved on.
But, I am old enough to remember code listings in magazines. I like to think the typesetters introduced deliberate mistakes because they hated the work so much - not to disrespect the fine profession of typesetters, but when you set your 100th `Poke` command in a row, you might think this isn’t what you signed up for..
Numerical Recipes in C. Had the hard copy but not the disk.
Often the code was just to obscure to work out as you typed, but there was some real value to typing it in. You got some real feel for it. Additionally it offered hard lessons in writing test cases.