--- a/contrib/check-code.py	Mon Apr 22 12:27:56 2013 +0400
+++ b/contrib/check-code.py	Mon Apr 22 16:33:28 2013 -0500
@@ -74,6 +74,8 @@
     (r'/dev/u?random', "don't use entropy, use /dev/zero"),
     (r'do\s*true;\s*done', "don't use true as loop body, use sleep 0"),
     (r'^( *)\t', "don't use tabs to indent"),
+    (r'sed .*\'/[^/]*/i[^\\][^\n]',
+     "put a backslash-escaped newline after sed 'i' command"),
   ],
   # warnings
   [