Formatting: Make sure `wp_sanitize_redirect()` encodes spaces in URLs instead of stripping them out.

Props donmhico, hlashbrooke, dd32, azaozz.
Fixes #36998.
Built from https://develop.svn.wordpress.org/trunk@46462


git-svn-id: http://core.svn.wordpress.org/trunk@46260 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/pluggable.php

@@ -1280,6 +1280,9 @@ if ( ! function_exists( 'wp_sanitize_redirect' ) ) :
 	 * @return string Redirect-sanitized URL.
 	 */
 	function wp_sanitize_redirect( $location ) {
+		// Encode spaces.
+		$location = str_replace( ' ', '%20', $location );
+
 		$regex    = '/
 		(
 			(?: [\xC2-\xDF][\x80-\xBF]        # double-byte sequences   110xxxxx 10xxxxxx
@@ -1296,7 +1299,7 @@ if ( ! function_exists( 'wp_sanitize_redirect' ) ) :
 		$location = preg_replace( '|[^a-z0-9-~+_.?#=&;,/:%!*\[\]()@]|i', '', $location );
 		$location = wp_kses_no_null( $location );
 
-		// remove %0d and %0a from location
+		// Remove %0D and %0A from location.
 		$strip = array( '%0d', '%0a', '%0D', '%0A' );
 		return _deep_replace( $strip, $location );
 	}

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.3-beta3-46461';
+$wp_version = '5.3-beta3-46462';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.