Re: Minor doc improvement in nt/INSTALL.W64

[Nikolay Kudryavtsev]

How to fix already checked out repository is better to mention, imho, 
because a broken checked out repostitory is what most people would start 
with. They clone the repo first and only then read the instructions.

`git clone --config ...' is probaly should be mentioned too, but in 
http://savannah.gnu.org/git/?group=emacs and not INSTALL. And even if we 
mention it there, someone would probably still just copypaste the basic 
instruction and end up with a broken repo.

--
Best Regards,
Nikolay Kudryavtsev