[Issue 12557] std.numeric.gcd documentation reports Euler's algorithm, but it uses Euclid's algorithm

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=12557

--- Comment #1 from Bert van Leeuwen <bert at e.co.za> ---
Of purely academical interest: Euler's formula is "somewhat" more complicated
than Euclid's: http://en.wikipedia.org/wiki/Euler's_formula  (and has a
completely different goal).

Also, Euler trod this earth about 2000 years after Euclid.

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