[0.13]

* Updated path of test program.
* Use terminology "plain textual content" instead of "string."
* Added condition that conforming parsers strip or replace NULL characters.
* Changed Example 196 to reflect the spec's rules.  It should not be a loose
  list as it has no blank lines.
* Adjusted semantically insignificant formatting of HTML output.
* Added example to spec of shortcut link with following space (#214).