hgweb: use a single-element tuple to return from protocol.unbundle() Python 2.3/2.4 don't support yielding from inside try/finally blocks.

add an Accept header to the http client

tests: add a test for the hgweb graph

hgweb: return content iterator instead of using write() callable

hgweb: all protocol functions have become generators Using the write() callable supplied by the start_response() call is frowned upon by the WSGI spec, returning an iterable over the content chunks is the recommended way. Be aware, though: returning many small chunks will slow down responses, because the server has to flush each chunk separately.

templater: make a template a string-only iterator

streamclone yields chunks instead of accepting a file-like object

hgweb: protocol functions take repo instead of web This makes it much easier for implementers of hgweb alternatives to simply call into protocol functions after setting up a repo and a request.