tweak

Validators-in-scripting-languages.md

@@ -64,8 +64,9 @@ in which case only the output file paths are passed to the script.
 
 As an example, the following PHP script, used as a compare script,
 requires that results match exactly:
+
 ```php
-#/usr/bin/env
+#! /usr/bin/env php
 <?php
 
 $f1 = $argv[1];