Fix typo in cherry-pick

[IAmHughes]

git cherry_pick should be git cherry-pick in the help output. I'm unsure if

visualizing-git/js/controlbox.js

Line 412 in 38ebc46

cherry_pick: function (args, opt, cmdStr) {

this function needs to be renamed as well, so I wanted to call it out.

If we do change it, then I think we also need to change the README here:

visualizing-git/README.md

Line 35 in 38ebc46

git cherry_pick

(command list at bottom).

[jmegner]

I don't think the cherry_pick in controlbox.js needs to change. Running git cherry-pick in the app works just fine. Line 320 takes care of replacing - characters with _ characters in method before this[method] is called on line 328.

[jmegner]

This repo's last commit was on 2019-01-30, so it's plausible that the Git School people have moved on. My thanks to them for their wonderful work.

I've forked this repo and merged your commit. It's live. Thanks! I was going to make a similar PR until I saw yours.

I think I'm going to merge in some other PRs, possibly do some of my own work (I haven't yet checked if there's a PR for making current local/remote mode more obvious to the user). I'll probably also try to contact the Git School people and see if they'd be okay with adding a member to help keep this wonderful project active.