Dir stack on magic enter

[llllvvuu]

Can be helpful for those who use autopushd. Otherwise there's no change in behavior.

[subnixr]

Thanks for the PR.

I see the usefulness of showing dirs output, but I think the first part of infoline should be brief and answer the following questions:

• Who am I?
• Which machine is this?
• Where am I?

The dir stack information is now shown before ls output, only if the stack contains more than one directory (source).

If you're interested in this project, I can give you commit access