crypto/ed25519/internal/edwards25519: fix typo in comments

Change-Id: I8133762d53d9e5d3cc13e0f97b9679a3248a7f0f
Reviewed-on: https://go-review.googlesource.com/c/go/+/273087
Trust: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Katie Hockman <katie@golang.org>

diff --git a/src/crypto/ed25519/internal/edwards25519/edwards25519.go b/src/crypto/ed25519/internal/edwards25519/edwards25519.go
index fd03c252af427bd27eda3a787c6062b949c65d5f..b091481b7734d4f6b5916caa3c00a2acee241733 100644 (file)
--- a/src/crypto/ed25519/internal/edwards25519/edwards25519.go
+++ b/src/crypto/ed25519/internal/edwards25519/edwards25519.go
@@ -722,7 +722,7 @@ func (p *ExtendedGroupElement) FromBytes(s *[32]byte) bool {
        FeOne(&p.Z)
        FeSquare(&u, &p.Y)
        FeMul(&v, &u, &d)
-       FeSub(&u, &u, &p.Z) // y = y^2-1
+       FeSub(&u, &u, &p.Z) // u = y^2-1
        FeAdd(&v, &v, &p.Z) // v = dy^2+1
 
        FeSquare(&v3, &v)