Fix spacing on macports instructions

Author: shivammathur

include/download-instructions/osx-macports.php

@@ -5,8 +5,10 @@
 # Please refer to https://guide.macports.org/chunked/installing.macports.html for installing MacPorts.
 
 # Install PHP <?= $version; ?>
+
 sudo port install php<?= $versionNoDot; ?>
 
+
 # Switch Active PHP <?= $version; ?> version
 sudo port select php php<?= $versionNoDot; ?>
 </code></pre>