hgweb: minor improvements for new web style
- make renamelink take a context
- pass current node to shortlog page rather than tip
- pass user/desc/date/rename to filediff
- improve template error reporting for foo%bar
#!/bin/sh
# http://www.selenic.com/mercurial/bts/issue433
hg init a
cd a
echo a > a
hg commit -Ama
hg parents -r 0 doesnotexist
true