[fpc-pascal] copy(), length(), and setlength() is not mentioned in fpc docs?

[Bee]

> I have documentation of those at: 
> http://lazarus-ccr.sourceforge.net/docs/rtl/system/stringfunctions.html

Yes, they are there on fpc doc for fpc 2.0.4. But when I open fpc doc on 
fpc 2.2.0, the detail pages of those routines are gone.

-Bee-

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