Some sweeping syntax changes for consistency:

(! foo) changed to ( ! foo)
|| changed to OR
changed newline standardization code in various places from preg_replace to str_replace
diff --git a/user_guide/helpers/file_helper.html b/user_guide/helpers/file_helper.html
index 13d0beb..2c3dba1 100644
--- a/user_guide/helpers/file_helper.html
+++ b/user_guide/helpers/file_helper.html
@@ -88,7 +88,7 @@
 <code>

 $data = 'Some file data';<br />

 <br />

-if (! write_file('./path/to/file.php', $data))<br />

+if ( ! write_file('./path/to/file.php', $data))<br />

 {<br />

 &nbsp;&nbsp;&nbsp;&nbsp; echo 'Unable to write the file';<br />

 }<br />