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math/big: reintroduce pre-Go 1.14 mention in GCD docs

It was removed in CL 217302 but was intentionally added in CL 217104.

Change-Id: I1a478d80ad1ec4f0a0184bfebf8f1a5e352cfe8c
Reviewed-on: https://go-review.googlesource.com/c/go/+/217941
Reviewed-by: Robert Griesemer <gri@golang.org>
This commit is contained in:
Filippo Valsorda 2020-02-05 15:24:30 -05:00
parent 60f11c44c0
commit 88ae4ccefb

View File

@ -505,8 +505,8 @@ func (z *Int) Exp(x, y, m *Int) *Int {
// GCD sets z to the greatest common divisor of a and b and returns z.
// If x or y are not nil, GCD sets their value such that z = a*x + b*y.
//
// a and b may be positive, zero or negative.
// Regardless of the signs of a and b, z is always >= 0.
// a and b may be positive, zero or negative. (Before Go 1.14 both had
// to be > 0.) Regardless of the signs of a and b, z is always >= 0.
//
// If a == b == 0, GCD sets z = x = y = 0.
//