pock: Add the `-s' option to the usage synopsis.

diff --git a/pock b/pock
index cb4497b..ff62d8b 100644 (file)
--- a/pock
+++ b/pock
@@ -1004,7 +1004,7 @@ def __main__():
   ## Prepare an option parser.
   op = OP.OptionParser(
     usage = '''\
-pock [-qv] CMD ARGS...
+pock [-qv] [-s SIEVEBITS] CMD ARGS...
         gen NBITS
         ll NBITS NSUBBITS
         check [FILE]''',