diff --git a/src/wp-includes/kses.php b/src/wp-includes/kses.php
index 300376197a..6bc1d005ba 100644
--- a/src/wp-includes/kses.php
+++ b/src/wp-includes/kses.php
@@ -1452,9 +1452,9 @@ function wp_kses_hair_parse( $attr ) {
 	// phpcs:disable Squiz.Strings.ConcatenationSpacing.PaddingFound -- don't remove regex indentation
 	$regex =
 		'(?:'
-		.     '[_a-zA-Z][-_a-zA-Z0-9:.]*'   // Attribute name.
+		.     '[_a-zA-Z][-_a-zA-Z0-9:.]*' // Attribute name.
 		. '|'
-		.     '\[\[?[^\[\]]+\]\]?' // Shortcode in the name position implies unfiltered_html.
+		.     '\[\[?[^\[\]]+\]\]?'        // Shortcode in the name position implies unfiltered_html.
 		. ')'
 		. '(?:'               // Attribute value.
 		.     '\s*=\s*'       // All values begin with '='.
diff --git a/tests/phpunit/tests/kses.php b/tests/phpunit/tests/kses.php
index deda0c8cef..3bf747ca40 100644
--- a/tests/phpunit/tests/kses.php
+++ b/tests/phpunit/tests/kses.php
@@ -629,22 +629,22 @@ EOF;
 				"array[1]='z'z'z'z",
 				false,
 			),
-			// using digit in attribute name should work
+			// Using a digit in attribute name should work.
 			array(
 				'href="https://example.com/[shortcode attr=\'value\']" data-op3-timer-seconds="0"',
 				array( 'href="https://example.com/[shortcode attr=\'value\']" ', 'data-op3-timer-seconds="0"' ),
 			),
-			// using underscore in attribute name should work
+			// Using an underscore in attribute name should work.
 			array(
 				'href="https://example.com/[shortcode attr=\'value\']" data-op_timer-seconds="0"',
 				array( 'href="https://example.com/[shortcode attr=\'value\']" ', 'data-op_timer-seconds="0"' ),
 			),
-			// using period in attribute name should work
+			// Using a period in attribute name should work.
 			array(
 				'href="https://example.com/[shortcode attr=\'value\']" data-op.timer-seconds="0"',
 				array( 'href="https://example.com/[shortcode attr=\'value\']" ', 'data-op.timer-seconds="0"' ),
 			),
-			// using digit at a beginning of attribute name should return false
+			// Using a digit at the beginning of attribute name should return false.
 			array(
 				'href="https://example.com/[shortcode attr=\'value\']" 3data-op-timer-seconds="0"',
 				false,