Re: [PATCH 4/7] refactor git_getpass into generic prompt function

Jeff King [off-list ref] writes:

 2. The first series had a special "name" parameter just for generating
    error messages. This drops it in the name of simplicity, so error
    messages have gone from (assuming you don't have a tty):

      Could not read password: No such device or address

    to:

      Could not read 'Username for 'https://example.com': ': No such
      device or address

    which is verbose, yes, but contains a little more useful
    information. The formatting is rather unfortunate,...

It also would be unpleasant to i18n it, I suspect. 

+	r = getpass(prompt);
+	if (!r)
+		die_errno("could not read '%s'", prompt);

Taking advantage of the "prompt-string"-ness of the message, this might be
a cuter workaround:

    fatal: Password: <<could not be read>>

But I do not think it matters that much. Let's queue what you have, and
work out these details in-tree.