rosie lookup: quick improvements

[oliver-sanders]

The rosie lookup interface is more important than it used to be due to the loss of rosie go.

However, the CLI help is not especially informative, especially on the query format.

Additionally, the tabulated output suffers from line wrapping which makes it very hard to read.

This is a quick slapdash attempt to improve the situation for users.

This PR:

• Improves the docs.
• Fixes the line wrap issue (caused by broken terminal size detection) - note lines will clip rather than wrapping.
• Changes the default format to a word-wrapped table (avoids the clipping problem), try the --no-pretty option to see the old format.

[oliver-sanders]

Heavily inspired by the Cylc --box format system.

Search the internet for "box drawing characters" for more info.

[oliver-sanders]

Just in case someone tries to run this in a 1980s build of emacs or whatever.

[oliver-sanders]

The stty size command just does not work when run via the Rose Popener module.

I did try hacking it, but I couldn't figure out what Popener was doing to aggravate stty and gave in.

[wxtim]

Happy that this will work as is. Happy to approve once you've decided what you want to do with the subprocess.

[oliver-sanders]

I've tested the shutil.get_terminal_size interface in various places and it seems to work well 👍, have converted both existing uses of stty over.

[ChrisPaulBennett]

What is causing the doc check failure? Sphinx is complaining about a dead link, but the link is fine.

[oliver-sanders]

Hmm, I wonder if StackOverflow is protecting against web crawlers, perhaps our test looks a little fishy? The link has passed the test in the past and still seems to work.