Group messages to make reporting less verbose

[contolini]

Fixes #8. Groups similar messages onto one line and lists the locations of the first 10 instances. If there are more than 10 instances, it appends plus XXX other locations.

Example output:

$ wcag wikipedia.org

  ✖  2 errors found.

  ✖  Label text is empty. Occurs at 115:1.
  ✖  Select element missing an associated label. Occurs at 117:1.

  ⚠  731 potential problems found.

  ⚠  Label text is empty. Occurs at .
  ⚠  Select element missing an associated label. Occurs at .
  ⚠  Title might not describe the document. Occurs at 6:1.
  ⚠  Dir attribute may be required to identify changes in text direction. Occurs at 20:1.
  ⚠  Text may refer to items by shape, size, or relative position alone. Occurs at 20:1.
  ⚠  Long quotations may not be marked using the blockquote element. Occurs at 20:1.
  ⚠  Unicode right-to-left marks or left-to-right marks may be required. Occurs at 20:1.
  ⚠  Groups of links with a related purpose are not marked. Occurs at 20:1.
  ⚠  Repeated components may not appear in the same relative order each time they appear. Occurs at 20:1.
  ⚠  Site missing site map. Occurs at 20:1.
  ⚠  Visual lists may not be properly marked. Occurs at 20:1.
  ⚠  Document may be missing a skip to content link. Occurs at 20:1.
  ⚠  H1 may be used for formatting. Occurs at 22:1.
  ⚠  Image may contain text that is not in Alt text. Occurs at 23:1, 538:52, 542:50, 546:51, 550:51, 554:50, 558:55, 562:52, 566:53, 570:52 plus 4 other locations.
  ⚠  Alt text is not empty and image may be decorative. Occurs at 23:1, 589:38.
  ⚠  Img has title attribute and image may be decorative. Occurs at 23:1.
  ⚠  Img element may require a long description. Occurs at 23:1, 538:52, 542:50, 546:51, 550:51, 554:50, 558:55, 562:52, 566:53, 570:52 plus 4 other locations.
  ⚠  Alt text does not convey the same information as the image. Occurs at 23:1.
  ⚠  Image may be using color alone. Occurs at 23:1, 538:52, 542:50, 546:51, 550:51, 554:50, 558:55, 562:52, 566:53, 570:52 plus 4 other locations.
  ⚠  Image may contain text with poor contrast. Occurs at 23:1, 538:52, 542:50, 546:51, 550:51, 554:50, 558:55, 562:52, 566:53, 570:52 plus 4 other locations.
  ⚠  Anchor text may not identify the link destination. Occurs at 36:1, 43:1, 50:1, 57:1, 64:1, 71:1, 78:1, 85:1, 92:1, 99:1 plus 304 other locations.
  ⚠  Link text may not be meaningful. Occurs at 36:1, 43:1, 50:1, 57:1, 64:1, 71:1, 78:1, 85:1, 92:1, 99:1 plus 304 other locations.
  ⚠  Form may delete information without allowing for recovery. Occurs at 109:1, 182:1.
  ⚠  All required form fields may not be indicated as required. Occurs at 109:1, 182:1.
  ⚠  Form submission data may not be presented to the user before final acceptance of an irreversable transaction. Occurs at 109:1, 182:1.
  ⚠  Tab order may not follow logical order. Occurs at 109:1, 182:1.
  ⚠  Form submission error messages may not provide assistance. Occurs at 109:1, 182:1.
  ⚠  Form submission error messages may not identify empty required fields. Occurs at 109:1, 182:1.
  ⚠  Label may not describe its associated control. Occurs at 113:1, 172:1, 173:1, 183:1, 184:1, 185:1, 187:1, 188:1.
  ⚠  Input possibly using color alone. Occurs at 115:1, 172:1, 187:1, 188:1.
  ⚠  H2 may be used for formatting. Occurs at 194:1, 215:1, 262:1, 347:1, 464:1.
  ⚠  Script user interface may not be accessible. Occurs at 593:1.
  ⚠  Script may cause screen flicker. Occurs at 593:1.
  ⚠  Script may use color alone. Occurs at 593:1.

@zrrrzzt @wpears

[zrrrzzt]

LGTM 👍

[wpears]

What's up with the following lines:

⚠  Label text is empty. Occurs at .

⚠  Select element missing an associated label. Occurs at .

[zrrrzzt]

Nice catch @wpears I was obviously reading trough this a bit quick

If you look at the top of the report

 ✖  Label text is empty. Occurs at 115:1.
 ✖  Select element missing an associated label. Occurs at 117:1.

and then the rest

 ⚠  731 potential problems found.

 ⚠  Label text is empty. Occurs at .
 ⚠  Select element missing an associated label. Occurs at .

It looks like the errors also appears in the potential problems, but without reference to location

[contolini]

Sheesh, good eye. I'll investigate tomorrow.