--- /dev/null
+--- a/bin/perltidy
++++ b/bin/perltidy
+@@ -175,7 +175,9 @@
+
+ Name of the output file (only if a single input file is being
+ processed). If no output file is specified, and output is not
+-redirected to the standard output, the output will go to F<filename.tdy>.
++redirected to the standard output (see B<-st>), the output will go to
++F<filename.tdy>. [Note: - does not redirect to standard output. Use
++B<-st> instead.]
+
+ =item B<-st>, B<--standard-output>
+