Just to help me understand why this change is needed...
Are you using mailinfo directly without splitting with mailsplit
first?
Well, when using gmail's web interface, when reading a mail, there is
this option to show the raw mail text (headers+body) with the 'show
original' option.
If you do 'save as..' in your browser to save what you get with that,
and try to do git-am on that file, it fails because it starts with
some whitespace.
With this patch git-am works on these files.
So, i'm not using mailsplit or any other mail tools at all, just my
browser and git.