Add spacing between the up and down bandwidth values for readability

[Calinou]

This is just an attempt at making bandwidth values more readable. There may be better ways to achieve this, such as color codes.

This kind of tool is all about fast visual grepping, so I figure it's worth trying to find ways to improve readability 🙂

Preview

[imsnif]

Heh, interesting :)

I'll play around with this some more in the next few days to see how it behaves in all the different window size layouts, but so far I like it.

One note for now: I'd also do this for the column title.

All the tests are obviously failing, but if we decide to move forward with them - I can fix them quickly. (and maybe also take the opportunity to write a doc about how to do that with cargo insta).

[imsnif]

Hey - so first: my apologies for the late review and for splitting it into two. I promise this is the last one and we can merge after we resolve a couple of issues.

I left one comment in the code, and the second one is more functional:
With this change, when I played around with the terminal window size, the Rate column gets a little cut off for me in the smallest supported width.
What I came up with that worked is this:

-const FIRST_COLUMN_WIDTHS: [u16; 4] = [20, 30, 40, 50];
+const FIRST_COLUMN_WIDTHS: [u16; 4] = [10, 30, 40, 50];
 const SECOND_COLUMN_WIDTHS: [u16; 1] = [20];
-const THIRD_COLUMN_WIDTHS: [u16; 4] = [10, 20, 20, 20];
+const THIRD_COLUMN_WIDTHS: [u16; 4] = [20, 20, 20, 20];

It can be further optimized if you feel creative. :)

About the tests: this repo uses insta for snapshot tests. In case you don't know it, in order to fix the tests, you can run them, have the new snapshots created and then review each one by running cargo insta (I should definitely document this :) ).

If you'd be willing to also fix the tests, that would be great as I could never quite get github to accept my pushes to other people's forks. I'm probably doing something wrong, but this will help me out. :)

Otherwise, as I mentioned, I like this change a lot. So even if you don't have the time to work on this, I'll likely get to it at some point.

[imsnif]

Looks like rustfmt is complaining again :) Could you run it once more please?

[imsnif]

Thankyou very much for this!