Update docstrings to official standard

[StanFromIreland]

Documentation

Some files have a mixture of both " ... " and """ ... """ docstrings should we mass update them to """ ... """ which I believe is the standard as per PEP 257.

For consistency, always use """triple double quotes""" around docstrings.

I can mass update this so that it all conforms to the standard if it will be merged.

[ericvsmith]

Thanks, but this is a cosmetic change, and not the kind of change we usually accept.

[AA-Turner]

I concur, there's no real added value here.

A

[terryjreedy]

I prefer "xxx" for single line docstrings as this is the normal practice for single line strings, and leaves room for 4 more chars without making the line too long. If consistency with the PEP is desired, then I think the PEP (or PEP 8) should be revised.