Fix typo in docstring: The switch is '-x', not '-s'.
Will backport to 2.3 myself.
diff --git a/Lib/compileall.py b/Lib/compileall.py
index ebe04ff..f906c80 100644
--- a/Lib/compileall.py
+++ b/Lib/compileall.py
@@ -110,7 +110,7 @@
except getopt.error, msg:
print msg
print "usage: python compileall.py [-l] [-f] [-q] [-d destdir] " \
- "[-s regexp] [directory ...]"
+ "[-x regexp] [directory ...]"
print "-l: don't recurse down"
print "-f: force rebuild even if timestamps are up-to-date"
print "-q: quiet operation"