boto/boto — pull request #1122 by jamesls (2012-11-19 21:26:59+00:00)
Title: Sort by param keys only for sigv4

The sigv4 spec states that the canonical_query_string should be sorted by the
param keys only. Boto was previously using 'key=value' as the sort key.
This will cause auth errors when serializing items with 10 or more items
(the included test shows an example of this).