[perl #117223] Remove IO::File example from perlfunc

I'm reopening this so that the issues raised in 
http://blog.nu42.com/2014/10/why-was-documentation-for-single.html

can be resolved

-- 
Karl Williamson

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via perlbug:  queue: perl5 status: resolved
https://rt.perl.org/Ticket/Display.html?id=117223

• RE: [perl #117223] Remove IO::File example from perlfunc by Ed Avis
• [perl #117223] Remove IO::File example from perlfunc by Karl Williamson via RT