from preamble:

"Change Set:		StringMorph
Date:			8 February 2004
Author:			stephane ducasse

Fix the problem with plain message sent to TextEmphasis. I browsed also 
the references to TextEmphasis and some other to see if there are still
some trace of #plain.
So please have a look. 

I noticed also that emphasis: is often used with a magic number such as
1 or 0. This is clearly
bad and my impression is that it should use TextEmphasis. At least this
would be worth investigating 

No tests has this is difficult to test that.
"!
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