This code fails to format with an error:
<td>File Number:</td><td><?php echo $FileNumber; ?></td>
as soon as one removes the php portion of the code in the table all is well again.
Here is the error log:
!ENTRY com.aptana.formatter.epl 4 0 2013-07-10 20:46:45.388
!MESSAGE (Build 188.8.131.52306062137) [ERROR] com.aptana.formatter.epl/debug Error while formatting the code in your editor.
Please submit a bug report through Studio's support and include the relevant code which triggered this error.
You may also turn on the com.aptana.formatter.epl/debug at the Studio's Troubleshooting preference page to log more details about this error.