patchbomb: fix From_ in the message's envelope
Localized date in the From_ prevents MUAs like mutt from parsing mbox files
generated by patchbomb. Using a 24 characters date in asctime format instead.
#!/bin/sh
# http://mercurial.selenic.com/bts/issue433
hg init a
cd a
echo a > a
hg commit -Ama
hg parents -r 0 doesnotexist
true