Coding Standards: Use strict comparison where static strings are involved.

This reduces the number of `WordPress.PHP.StrictComparisons.LooseComparison` issues in half, from 1897 to 890.

Includes minor code layout fixes for better readability.

See #49542.
Built from https://develop.svn.wordpress.org/trunk@47808


git-svn-id: http://core.svn.wordpress.org/trunk@47584 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-list-util.php

@@ -112,9 +112,9 @@ class WP_List_Util {
 			}
 
 			if (
-				( 'AND' == $operator && $matched == $count ) ||
-				( 'OR' == $operator && $matched > 0 ) ||
-				( 'NOT' == $operator && 0 == $matched )
+				( 'AND' === $operator && $matched == $count ) ||
+				( 'OR' === $operator && $matched > 0 ) ||
+				( 'NOT' === $operator && 0 == $matched )
 			) {
 				$filtered[ $key ] = $obj;
 			}