Shorten the module synopsis.

Doc/lib/libstat.tex

@@ -3,7 +3,7 @@
 \section{Standard Module \module{stat}}
 \declaremodule{standard}{stat}
 
-\modulesynopsis{Constants and functions for interpreting the results of
+\modulesynopsis{Utilities for interpreting the results of
 \function{os.stat()}, \function{os.lstat()} and \function{os.fstat()}.}