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I'd like to see the releasing interned string patch applied.
 I think it's almost ready, isn't it?  It would make
patching easier and seems to be a good idea.

For me, the easiest way to produce patches is to use cvs. 
You can keep multiple cvs trees around easy enough (for
having multiple overlapping/independant patches).  To create
patches with cvs:

  cvs diff -C 5 [file1] [file2] ....