INFOPATH in OS X application bundle

[Andrew Nesbit]

There's a bit of code in src/mac.c which sets the environment variable 
INFOPATH if it's not already set, when Emacs is installed as a 
self-contained application bundle.

Normally, Info-directory-list should be initialised based on 
Info-default-directory-list. But because INFOPATH gets set behind the 
user's back, this does not happen, and so Info-directory-list is set 
based on INFOPATH. This is unexpected and confusing behaviour (at least 
it was for me).

Would it be better to add the bundle's Info directory to 
Info-default-directory-list, instead of playing around with INFOPATH? 
Isn't this the sort of thing that Info-default-directory-list is 
designed for?

Andrew