Update list of void elements

Author: fredden

Magento2/Sniffs/Html/HtmlClosingVoidTagsSniff.php

@@ -44,15 +44,13 @@ class HtmlClosingVoidTagsSniff implements Sniff
         'col',
         'embed',
         'hr',
+        'img',
         'input',
-        'keygen',
         'link',
-        'menuitem',
         'meta',
-        'param',
         'source',
         'track',
-        'wbr'
+        'wbr',
     ];
 
     /**

Magento2/Sniffs/Html/HtmlSelfClosingTagsSniff.php

@@ -17,13 +17,13 @@
 class HtmlSelfClosingTagsSniff implements Sniff
 {
     /**
-     * List of void elements
+     * List of void elements.
      *
-     * https://www.w3.org/TR/html51/syntax.html#writing-html-documents-elements
+     * https://html.spec.whatwg.org/multipage/syntax.html#void-elements
      *
      * @var string[]
      */
-    private $voidElements = [
+    private const HTML_VOID_ELEMENTS = [
         'area',
         'base',
         'br',
@@ -32,11 +32,8 @@ class HtmlSelfClosingTagsSniff implements Sniff
         'hr',
         'img',
         'input',
-        'keygen',
         'link',
-        'menuitem',
         'meta',
-        'param',
         'source',
         'track',
         'wbr',
@@ -70,7 +67,7 @@ public function process(File $phpcsFile, $stackPtr)
 
         if (preg_match_all('$<(\w{2,})\s?[^<]*\/>$', $html, $matches, PREG_SET_ORDER)) {
             foreach ($matches as $match) {
-                if (!in_array($match[1], $this->voidElements)) {
+                if (!in_array($match[1], self::HTML_VOID_ELEMENTS)) {
                     $phpcsFile->addError(
                         'Avoid using self-closing tag with non-void html element'
                         . ' - "' . $match[0]  . PHP_EOL,

Magento2/Tests/Html/HtmlClosingVoidTagsUnitTest.inc

@@ -22,10 +22,8 @@
     <hr/>
     <img src="" alt=""/>
     <input type="text" id="test_input"/>
-    <keygen/>
     <link/>
     <meta/>
-    <param name="" value=""/>
     <video>
         <source/>
         <track src=""/>

Magento2/Tests/Html/HtmlClosingVoidTagsUnitTest.php

@@ -22,6 +22,8 @@ public function getErrorList()
      */
     public function getWarningList()
     {
-        return [1 => 15];
+        return [
+            1 => 14,
+        ];
     }
 }

Magento2/Tests/Html/HtmlSelfClosingTagsUnitTest.1.inc

@@ -22,10 +22,8 @@
         <hr/>
         <img src="" alt=""/>
         <input type="text" id="test_input"/>
-        <keygen/>
         <link/>
         <meta/>
-        <param name="" value=""/>
         <video>
             <source/>
             <track src=""/>

Magento2/Tests/Html/HtmlSelfClosingTagsUnitTest.php

@@ -14,7 +14,9 @@ class HtmlSelfClosingTagsUnitTest extends AbstractSniffUnitTest
      */
     public function getErrorList()
     {
-        return [1 => 9];
+        return [
+            1 => 9,
+        ];
     }
 
     /**