Question on revision date

The page located at http://www.cplusplus.com/doc/tutorial/ says, Last update on Sep 29, 2009" while the PDF file located at"http://www.cplusplus.com/
files/tutorial.pdf says, "Last revision: June, 2007"

I'm wondering if the PDF file is as up to date as the pages at http://www.cplusplus.com/doc/tutorial/, and that the "Last revision" note in the PDF is a mistake, or if the PDF file is indeed not as up to date as the web version? Your help would be greatly appreciated, thank you.
I think the last revision of the web part simply added the pdf file.
- http://www.cplusplus.com/forum/lounge/8024/ -
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