How should I use git diff for long lines?

Question

I\'m running git-diff on a file, but the change is at the end of a long line.

If I use cursor keys to move right, it loses colour-coding—and worse the lines do

Answer 1

Mac OSX: None of the other answers except someone45's '-S' while less is running worked for me. It took the following to make word-wrap persistent:

git config --global core.pager 'less -+$LESS -FRX'