How to make git log decorate by default

Question

I frequently type git log when what I actually want is git log --decorate. How do I make it decorate by default?

I have seen lots of answer

Answer 1

git config log.decorate auto

for global setting add --global param.

so it would be git config --global log.decorate auto

The aliases are made with git config alias.lg "log --decorate"

Edit: Updated log.decorate true to auto based on answer from VonC as this is now the recommended way of doing so.