[PATCH 0 of 4] pachbomb: only one diffstat confirmation prompt, add --confirm option

[Christian Ebert]

Hi,

This series refactors patchbomb's diffstat confirmation prompts
introducing a behaviour change for "hg email --diffstat" and
adding a --confirm option.

(The first 2 patches are a resend)

The first patch allows the localization of the choices
for patchbomb's diffstat prompt by using ui.promptchoice().

Patchbomb's custom prompt was completely silent in
non-interactive mode. The second patch makes it show message and
prompt by catching potential errors before running it through
pure ui.prompt().

The third patch changes the behaviour of "hg email --diffstat":
Instead of the confirmation prompts for each message/patch which
also show the patch description, there is now only one prompt
showing the series' message details and diffstats.

The fourth patch adds a --confirm option which presents the same
prompt as --diffstat, but does not write the diffstats in the
message bodies.


Thanks to Mads Kiilerich for the valuable input on prompt
handling in general and the discussion of the diffstat prompt
behaviour.

c