title: how to get git log -p to show changes in merge commits
body: <p>I have a branch with a function definition missing but the function is still being used causing a crash. The function definition must have been deleted during a merge. I have done 'git log -p' and searched for the function definition and I can see it being defined but couldn't find it being deleted later on. This leads me to believe that 'git log -p' doesn't show merge changes? How can I get this functionality?</p>