Allow to edit the commit message

[Tobias Girstmair]

On Sat, Feb 29, 2020 at 01:28:11PM +0100, Gianluca Recchia wrote:
> the default 
>commit message is often not very descriptive of the change I made to an 
>entry and I often find myself having to amend the commit in order to 
>change the message.

What kind of information are you putting in there, that you don't want 
within the encrypted file?  I'm not sure it is a good idea to encourage 
detailed commit messages, since they might be an information leak.