Apply fixes

Author: swissspidy

.readme-partials/USING.md

@@ -202,6 +202,7 @@ The following environment variables can be set to override the default database
   - `WP_CLI_TEST_DBUSER` is the user that the tests run under (defaults to "wp_cli_test").
   - `WP_CLI_TEST_DBPASS` is the password to use for the above user (defaults to "password1").
   - `WP_CLI_TEST_DBTYPE` is the database engine type to use, i.e. "sqlite" for running tests on SQLite instead of MySQL (defaults to "mysql").
+  - `WP_CLI_TEST_OBJECT_CACHE` is the persistent object cache backend to use. Only supports "sqlite".
 
 Environment variables can be set for the whole session via the following syntax: `export WP_CLI_TEST_DBNAME=custom_db`.
 

src/Context/FeatureContext.php

@@ -1653,7 +1653,7 @@ public function install_wp( $subdir = '', $version = '' ): void {
 
 		if ( 'sqlite' === getenv( 'WP_CLI_TEST_OBJECT_CACHE' ) ) {
 			// Derive a deterministic cache key salt from the install cache directory and subdir
-			$salt = md5( self::$install_cache_dir . '/' . $subdir );
+			$salt              = md5( self::$install_cache_dir . '/' . $subdir );
 			$config_extra_php .= "define( 'WP_CACHE_KEY_SALT', '" . $salt . "' );\n";
 		}
 
@@ -1969,7 +1969,7 @@ private static function dir_diff_copy( $upd_dir, $src_dir, $cop_dir ): void {
 					continue; // File vanished before it could be copied.
 				} else {
 					if ( ! is_dir( dirname( $cop_file ) ) ) {
-						@mkdir( dirname( $cop_file ), 0777, true );
+						mkdir( dirname( $cop_file ), 0777, true );
 					}
 					if ( ! copy( $upd_file, $cop_file ) ) {
 						$error = error_get_last();