test.pl:run_multiple_progs: Document cmdline switches

diff --git a/t/test.pl b/t/test.pl
index aee1d24..8a810f0 100644 (file)
--- a/t/test.pl
+++ b/t/test.pl
@@ -905,7 +905,8 @@ sub fresh_perl_like {
 # Each program is source code to run followed by an "EXPECT" line, followed
 # by the expected output.
 #
-# The code to run may contain (note the '# ' on each):
+# The code to run may begin with a command line switch such as -w or -0777
+# (alphanumerics only), and may contain (note the '# ' on each):
 #   # TODO reason for todo
 #   # SKIP reason for skip
 #   # SKIP ?code to test if this should be skipped