Docs: Misc corrections and additions to inline documentation.

See #39130
Props keesiemeijer


git-svn-id: https://develop.svn.wordpress.org/trunk@39639 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/functions.php

@@ -5392,7 +5392,7 @@ function wp_delete_file( $file ) {
 	 *
 	 * @since 2.1.0
 	 *
-	 * @param string $medium Path to the file to delete.
+	 * @param string $file Path to the file to delete.
 	 */
 	$delete = apply_filters( 'wp_delete_file', $file );
 	if ( ! empty( $delete ) ) {