Straightening a line in Illustrator?

If you take the pen tool, draw a line (without holding down the shift key) the line will be jagged. Now, it used to be in the old Illustrator, if you used the hollow pointer and highlighted the two ends, hit command (or control) + l (L) it would automatically line up the line (not join, it’s already joined). With the new illustrator, that old command doesn’t work anymore. I’ve asked other people who work in Illustrator and even looked in the manual…can’t find an answer. what I’m looking for is the command, not doing it manually.I work on a PC and MAC. It doesn’t matter.