Update docs to reflect PSR-12, *not* PSR-2.

.github/CONTRIBUTING.md

@@ -36,7 +36,7 @@ When submitting a new pull request, your `feature/my-cool-new-feature` should be
 
 ### Coding standards
 
-This project uses [the PSR-2 coding standards](http://www.php-fig.org/psr/psr-2/).
+This project uses [the PSR-12 coding standards](http://www.php-fig.org/psr/psr-12/).
 
 Standards are enforced via [PHP_CodeSniffer](https://github.com/PHPCSStandards/PHP_CodeSniffer/), which can be run any time with the following:
 
@@ -53,6 +53,7 @@ composer test:standards
 composer test:unit
 ```
 
+
 #### Code coverage
 
 [![Coverage Status](https://coveralls.io/repos/github/stevegrunwell/phpunit-markup-assertions/badge.svg?branch=develop)](https://coveralls.io/github/stevegrunwell/phpunit-markup-assertions?branch=develop)

src/MarkupAssertionsTrait.php

@@ -271,7 +271,7 @@ private function getInnerHtmlOfMatchedElements($markup, $query)
         // Loop through results and collect their innerHTML values.
         foreach ($results as $result) {
             if (!isset($result->firstChild)) {
-                continue;
+                continue; // @codeCoverageIgnore
             }
 
             $document = new \DOMDocument();