Description of problem:
After upgrading to the emacs version of F25, po-send-mail no longer works.  Normally it creates a buffer with an appropriate e-mail header and a base64 encoded body.  But now the entire buffer gets base64 encoded.  Not surprisingly, the mail functions don't know what to do with that afterwards.

I believe this is because of the use of "(region-beginning)" near line 3525 in po-mode.el.  Probably something that used to set the mark in previous emacs version doesn't do so any more, or possibly the other way around.  To fix this, I changed the save-excursion part of the function to look like below.  That appears to make things work again.  Someone with more emacs lisp skills than I have is welcome to comment if this is a good way to do it.

            (save-excursion
              (let
                  ((beginning (point)))
                (insert-buffer-substring buffer)
                (shell-command-on-region
                 beginning (region-end)
                 (concat po-gzip-uuencode-command " " name ".gz") t t)))))))


Version-Release number of selected component (if applicable):
emacs-25.0.94-1.fc24.x86_64
emacs-gettext-0.19.8.1-1.fc24.noarch


How reproducible:
Every time


Steps to Reproduce:
1. Open a po file in emacs
2. Hit "M"
3. Answer the questions


Actual results:
A buffer completely base64 encoded.


Expected results:
A buffer with a legal mail header, and a base64 encoded body.


Additional info:
I've sent this report upstreams too: http://lists.gnu.org/archive/html/bug-gettext/2016-07/msg00027.html