[MERGE] (robertc) Knit repo format tidyups from the packs branch. (Robert Collins)

[Robert Collins]

Some minor tidyups in the knit repo format - reduce code duplication,
add a couple of lazy imports, and some -Devil printing.

-Rob
-- 
GPG key available at: <http://www.robertcollins.net/keys.txt>.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: bzr-mail-DhFYlf.patch
Type: text/x-patch
Size: 8320 bytes
Desc: not available
Url : https://lists.ubuntu.com/archives/bazaar/attachments/20070925/e1a9d8d4/attachment.bin 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part
Url : https://lists.ubuntu.com/archives/bazaar/attachments/20070925/e1a9d8d4/attachment.pgp