code example has wron format

fix this:

6.3.18.3 Execution Model for Automated Imposition

The pseudo-code below describes the processing performed by the imposition engine at a high level:
For each Set in the order specified in the input RunList(Document)
For each  Imposition Template
For each  Page Pool in the Set
If the Partition Key conditions for the  Imposition Template are satisfied
Process the  Page Pool through the  Imposition Template.