[RFA/doco] Update copyright year in refcard

[Joel Brobecker]

This one is a little less obvious: doc/refcard.tex.

The header is easy, I just added 2010.  The text, however, does not
use spaces after the comma when specifying the copyright years.
I followed the current usage for now, but I can certainly add spaces.
I wonder if we might simply want to use year range, eg 2000-2010.
We have forgotten to update this file for years, hence the missing
years in the text...

2010-01-01  Joel Brobecker  <brobecker@adacore.com>

        * refcard.tex: Update copyright year in header and text.

Tested by rebuilding the PDF and HTML documentation.

-- 
Joel
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