Big whoop

Why is this good? Why not just commit the working tree?

Suppose you were adding some code about foozles

        perl-lib/Role/CanFoozle.pm
        perl-lib/Foozle/Basic.pm
        t/foozle/basic.t
        t/foozle/woozle.t
        doc/foozles.pod

In the course of this you modified the penguin manager also:

        perl-lib/PenguinMgr.pm
        t/penguin_mgr/swim.t
        doc/penguins.pod

Now you want to record two commits: one for the foozles, one for the penguins

Easy:

Add the foozle changes to the index, and record a commit

Then add the penguin changes to the index and record another commit