Remove ending punctuation from WordNodes

[localjo]

This is a potential workaround for https://github.com/wooorm/nlcst/issues/4 but I'm almost sure that this solution is incorrect.

[codecov-io]

Current coverage is 99.11% (diff: 80.00%)

Merging #4 into master will decrease coverage by 0.88%

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[wooorm]

I don’t really think that this temporary problem should be fixed, temporarily, in this project.

Especially like this, as it could break other plugins, and does break words like e.g. and abbreviations ending in a dot mr..

Having it in quality-docs until a real fix is out is better, I feel. Is that OK, for now?

[localjo]

I'm not exactly sure where to put a fix like this in quality-docs. I guess I could add some kind of plugin for retext with workarounds that filter the tree. :-/

[wooorm]

Yeah, like that instead!

retext().use(function () {
  return function (node) {
    visit(node, 'WordNode', function () {
      if (/*...*/) { /*...*/ }
    });
  };
})

[localjo]

Cool. Doing this in quality-docs for now. https://github.com/SparkartGroupInc/quality-docs/commit/30b1e7cb31b57fac84814f5822a3ceb86eacf5cd