Find a way to make reporting less verbose

[contolini]

Some sites report hundreds of potential problems which can be overwhelming to scroll through. The problems often have the same message but occur on different lines.

Maybe we should cap the list by default. Something like:

  ⚠  499 potential problems found.

  ⚠  183:70 Anchor text may not identify the link destination.
  ⚠  183:174 Anchor text may not identify the link destination.
  ⚠  183:243 Anchor text may not identify the link destination.
  ⚠  183:295 Anchor text may not identify the link destination.
  ⚠  183:351 Anchor text may not identify the link destination.
  ⚠  183:409 Anchor text may not identify the link destination.
  ⚠  183:467 Anchor text may not identify the link destination.
  ⚠  183:522 Anchor text may not identify the link destination.
  ⚠  183:579 Anchor text may not identify the link destination.
  ⚠  183:638 Anchor text may not identify the link destination.
  ⚠  183:694 Anchor text may not identify the link destination.
  ⚠  183:749 Anchor text may not identify the link destination.

  487 additional problems not shown. Run with `--verbose` to show full list.

Or maybe we should just group similar errors?

  ⚠ 183:70, 183:174, 183:243, 183:295, 183:351, 183:409, 183:467, 183:522, 183:579, 183:638, 183:694, 183:749 Anchor text may not identify the link destination.

Or:

  ⚠ Anchor text may not identify the link destination. Occurs at 183:70, 183:174, 183:243, 183:295, 183:351, 183:409, 183:467, 183:522, 183:579, 183:638, 183:694, 183:749.

Example of the problem:

[wpears]

I like the third option, you'd get complete information without taking up unnecessary screen space.

[zrrrzzt]

I like the third option as well.
If we are going to implement more control of the output it would be nice to have an option for just the errors and one for only PASS/FAIL.