[PATCH] bookmarks: rename the active bookmark with no arguments

[demelier.david at gmail.com]

On Mon, 2017-07-24 at 21:28 -0400, Augie Fackler wrote:
> I think this feels okay-ish. David, please re-send after August 1st.
> 
> (Sorry this feel through the cracks.)

Yes, I'll also update it to use '.' argument instead as it's common in
several other commands (hg push/pull -B .) to specify the active
bookmark and it also addresses the issues that Ryan pointed out. It
does not swap the logic of old/new selection.

Thus, we will have the following behaviour:

hg book -m old_new (as before)
hg book -m . new (rename the active bookmark to new if any)

Regards,

-- 
David