Save to pgm actually saves to pnm

Please add action list with example input and (actual and desired) output images. You can zip it if you like.

Apparently PIL saves PGM internally as PPM unless you convert the image to grayscale first. Add proper check for format to fix the issue (perhaps to imtools save?).

Here's a test case I used to verify this behavior:
from Image import open

im = open('Lenna.png')

gim = im.convert('L')
gim.save('Lenna1.pgm')
im.save('Lenna2.pgm')
im.save('Lenna3.ppm')

This is fixed in trunk and will be part of next release 0.2.7 Big thanks to Juho and Ken!

This bug was fixed in the package phatch - 0.2.7-1

---------------
phatch (0.2.7-1) unstable; urgency=low

  [ Stani M ]
  * Upstream bugfix release (Closes LP: #472978, #487435, #516763, #516858,
    #525999, #526047, #526235, #526237, #526489, #529343, #529429, #525831,
    #526237, #529544, #529605, #531375, #531705, #531728, #532346, #532356,
    #532540, #532544, #533068, #534723, #534834, #534835, #535189, #535192,
    #536820)
  * debian/control: Add python-nautilus to phatch-nautilus's Depends

  [ Emilio Pozuelo Monfort ]
  * debian/rules:
    - Adapt for the upstream changes.
  * debian/copyright:
    - Updated for the new version.
 -- Stani <email address hidden> Mon, 22 Mar 2010 18:33:31 +0000