[tex-hyphen] problems with sanskrit patterns and xetex?

[Arthur Reutenauer]

> Just for the record: The reason they caused a problem is that their Unicode 
> category is "symbol" rather than "letter", and therefore the 
> (auto-generated) file unicode-letters.tex that sets up \catcode and (more 
> significantly, here) \lccode values for all the "letters" in Unicode does 
> not include these characters.

  OK, thanks for the explanation.  Note that in any case they would have
caused problems for hypothetical users of LuaLaTeX.

> In general, if for some reason you want to include characters whose Unicode 
> category is not Letter (or Combining Mark) in \patterns, you'll need to 
> explicitly set their \lccode first.

  Thanks, I'll check next time.

> I don't suppose there will be many cases where people want to include 
> "symbol" characters in hyphenation patterns, but there may be occasional 
> instances -- such as this.

  I'm not sure why they're included in the Sanskrit patterns either, but
I trust Yves on this.

	Arthur