git-show show HEAD if no commit specified

[fmnoise]

No description provided.

[akonwi]

If you enter head it achieves the same thing. I wouldn't want to have a null input result in valid output. Because there is an input required I think there should be a responsibility to enter which commit to show.

There are two alternatives I'm more comfortable with:

1. Change the placeholder of the input to make it clear that the default will be HEAD
2. Create a second command with the label 'Show HEAD' that won't show the input as a second step

Could you also add tests around what you add?

[fmnoise]

Actually now it just fails silently if nothing has entered. If you'll open dev tools console there's an error:

That's why I decided to make command execution most close as it is when you enter git show in console without adding any commit hash.
I'll add some tests.
Also not sure why do we need this code, as it's does nothing
https://github.com/akonwi/git-plus/blob/master/lib/models/git-show.coffee#L53

[akonwi]

Yea understandable. Will you go the route of making it obvious in the placeholder that it will default to HEAD?

Feel free to remove line 53 as well

[akonwi]

I've merged this