'minimize' keyword needs better documentation / should be off by default

[keflavich]

The subcube methods use minimize=True by default, which trims blank edges.

We should probably set that to False by default, since it can be a performance hit.

It is also inadequately documented.

[harry353]

Is this still an issue? I could take a closer look. Would that be for the BaseSpectralCube class only?

[keflavich]

Looks like it, yes:

spectral-cube/spectral_cube/spectral_cube.py

Line 2085 in 06f05ed

minimize=True):