[Help-smalltalk] Sending a method 'nil'.. generates an error

[Rick Flower]

I'm porting some code to generate RTF's from a set of
code I found for Squeak.. It converted OK but when I 
run it I get this from gst :

gst ./source.gst
"Global garbage collection... done"
Loading package SUnit
./source.gst:4075: sending `nil', most likely you forgot a period

The method in question is this :

default [
   "set the receiver with the default format."

   <category: 'settings'>
  ^self nil
]

...

nil [
   "Set the receiver with this format"

   <category: 'settings'>
   ^self name: 'nil'
]

Aside from renaming the 'nil' method to something
else (e.g. nile), is there a way to keep gst happy
with this code?