Two installer construction instructions is one too many.
Tor includes two different NSI files for building the the Tor Expert Bundle installer. One is contrib/win32build/tor.nsi.in, and the other is contrib/win32build/tor-mingw.nsi.in. The former file says right at the top:
; NOTE: This file might be obsolete. Look at tor-mingw.nsi.in instead.
Right now tor-mingw.nsi.in is the only file being used to build the actual NSI. I suspect tor.nsi.in is just dead weight.
< armadev> yeah, you should confirm with erinn that nobody has any use for anything in that file, and then remove it