bug#52725: 27.1; Allow editing same draft twice without exiting group first

[積丹尼 Dan Jacobson]

Put the cursor on the drafts folder containing existing drafts, and hit
 <return>                ;; gnus-group-select-group
 D e                     ;; gnus-draft-edit-message
 bla bla                 ;; self-insert-command
 C-c C-d                 ;; message-dont-send #but oops, we forgot a third bla, 
so
 D e                     ;; gnus-draft-edit-message
At this point an error will happen. We need to quit the group and
reenter if we don't want the error.

Or, at least on
(info "(gnus) Drafts")
at

      When you want to continue editing the article, you simply enter the
   draft group and push ‘D e’ (‘gnus-draft-edit-message’) to do that.  You
   will be placed in a buffer where you left off.

Mention that there is a bug causing this to only work once.