[COMMIT] Test that all listed langenv input methods exist.

[Aidan Kehoe]

 Ar an chéad lá is fiche de mí Bealtaine, scríobh Stephen J. Turnbull: 

 > QUERY
 > 
 > Aidan Kehoe writes:
 > 
 >  > +         ;; on OS X. LATIN CAPITAL LETTER D WITH STROKE does decompose.
 >                                                             ^
 > "does not decompose"? --------------------------------------+

http://developer.apple.com/qa/qa2001/qa1173.html

There’s no available combining stroke in current Unicode; Đ maps to itself
in decomposed form, while š maps to U+0073 U+030C. 

I can’t actually get the problem to reproduce itself outside the context of
that test. I imagine, though, that you’ve been seeing the test failure too,
unless your /tmp/ directory is on a UFS mount. 

 > BTW, I think the right way to handle the input methods is in the
 > packages, despite your comment that
 > 
 >  > 	The other input methods require changes to mule-category.el that
 >  > 	21.4 doesn't have, and as such supporting them in the packages is
 >  > 	mostly impossible.
 > 
 > I think we can simply define those changes as a feature, either with
 > fboundp or with featurep, and require it.

Another bit of awkwardness is that our mule-category.el design differs
slightly from that of GNU, and I don’t understand why enough right now to
abandon ours or to work out how to map GNU’s functionality to our
design. Ben, I imagine you don’t have at the front of your consciousness
right now, but if you’ve anything to comment on it, I’d love to hear it.

-- 
On the quay of the little Black Sea port, where the rescued pair came once
more into contact with civilization, Dobrinton was bitten by a dog which was
assumed to be mad, though it may only have been indiscriminating. (Saki)