Patcher has just created initial ChangeLog entries for you. You must now
browse through the ChangeLog file(s) and fill the entries as you see
fit. From the mail buffer type C-c C-p n
(patcher-mail-first-change-log). This command will bring you to
the first ChangeLog file that you need to fill in. From a ChangeLog
buffer, the same keyboard sequence will will bring you to the next one,
and so on (patcher-change-log-next).
Once you're done, you can very well save the ChangeLog buffers. However,
don't kill them! Don't even think about it. Patcher still needs them.
From any of the ChangeLog buffers you just filled in, type C-c C-p
m (patcher-change-log-mail). This will bring you back to the
mail buffer.