spt files often give syntax errors if there are not enough new lines at the end of the file.
example (requires two newlines at the end):

module test-prettyprint

language Stratego-Sugar

/**
* Testcases Pretty-Print
*/
test Rename S-Rule

module test-prettyprint
rules
bar( refactor rename-refactoring(“foo”)

Submitted by Maartje on 4 August 2011 at 14:31

This particular example seems to work fine, although there is a minor syntax highlighting glitch on the last line.