[PATCH] Flush password prompts for non-terminal callers

[Steven Streeting]

> A meta comment: See http://mercurial.selenic.com/wiki/ContributingChanges , especially

Sorry - I tried to follow the instructions manually but I guess I should have just installed the patchbomb ext. 

> Don't change the prompt.

Oops, I hadn't meant to - I must have chopped off the trailing space by accident. 

> Instead I suggest first writing the prompt (with flushing), and then call the existing functions with '' as prompt.

Ok, this sounds reasonable, so just a sys.stderr.write() followed by a sys.stderr.flush() and then the previous getpass() / raw_input() calls? If I can get that to work, should I re-submit?

Cheers
Steve