[plt-scheme] Document semantics of require-for-template

12.3.4 of the MzScheme Language Manual says that "a for-template import 
of M within N causes the referenced module to be executed at the run-time 
of any P that includes a for-syntax import of M."

I'm having trouble understanding this statement. It seems that the
"referenced module" here is M, but then shouldn't M be executed at the
run-time of any P which requires-for-syntax module _N_?

-Casey