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-http-encoding.php

@@ -101,7 +101,7 @@ class WP_Http_Encoding {
 	public static function compatible_gzinflate( $gzData ) {
 
 		// Compressed data might contain a full header, if so strip it for gzinflate().
-		if ( substr( $gzData, 0, 3 ) == "\x1f\x8b\x08" ) {
+		if ( "\x1f\x8b\x08" === substr( $gzData, 0, 3 ) ) {
 			$i   = 10;
 			$flg = ord( substr( $gzData, 3, 1 ) );
 			if ( $flg > 0 ) {