Documentation updates (#3728)
Documentation updates (#3728)

* Replaced inline URLs with cross-references.
* Updated HTML examples
* Replaced '--' with em-dashes
* Removed incorrect error code
* Added additional text concerning globbing
* Removed part of testing section concerning using different reporter (which didn't work)
outsideris/mocha,mochajs/mocha,adamgruber/mocha,outsideris/mocha,adamgruber/mocha,mochajs/mocha,mochajs/mocha,adamgruber/mocha