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.

git-svn-id: https://develop.svn.wordpress.org/trunk@47808 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/template.php

@@ -2330,7 +2330,7 @@ function compression_test() {
 			}
 
 			if ( 2 == test ) {
-				if ( '"wpCompressionTest' == r )
+				if ( '"wpCompressionTest' === r )
 					this.get('yes');
 				else
 					this.get('no');