style arguments to make their correspondence with their description more legible

[glyph]

from https://docs.twisted.org/en/stable/api/twisted.internet.interfaces.IReactorProcess.html#spawnProcess

consider this presentation:

it is extremely hard to see where args ends and env begins. two things would be helpful here:

1. env should be vertically aligned with the beginning of its description, rather than floating in the middle, and
2. there should be some visual separation — probably a hairline, but at least some whitespace greater than a standard intra-description paragraph break — between each argument's description

[tristanlatr]

Thanks for creating this issue, I totally agree. I’ll fix this before next release.

[glyph]

Thanks for creating this issue, I totally agree. I’ll fix this before next release.

Thanks! I was mainly making a note so I wouldn't forget about this, but if you have the time to actually fix it nicely, so much the better ;)