I found this in the documentation
“As from Blender 2.30 two buffers exist by default, one named “KEYLIST” holding a hotkeys quick reference, the other named “LAYERS” ready to hold written layer descriptions.”
It is at this page : http://mediawiki.blender.org/index.php/Reference/Windows/Text
AFAIK and can experiment (with a newly generated .B.blend), this is not accurate anymore.
Am I wrong ?