create-pr: print the PR content to stdout

[TomasTomecek]

In case I forget to do git push, I need to type again. Would be nice to have the pull request written down in terminal.

[lachmanfrantisek]

In case I forget to do git push,

This is done automatically, but I often have this problem when push fail.

[TomasTomecek]

Looks like I need to update.