sha3: fix typo in comment

Change-Id: I2cd8fe55a3918771744ca6b53b8335282b7d2b40
GitHub-Last-Rev: 34bf09adb2
GitHub-Pull-Request: golang/crypto#189
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/333429
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Keith Randall <khr@golang.org>

sha3/xor_generic.go

@@ -19,7 +19,7 @@ func xorInGeneric(d *state, buf []byte) {
 	}
 }
 
-// copyOutGeneric copies ulint64s to a byte buffer.
+// copyOutGeneric copies uint64s to a byte buffer.
 func copyOutGeneric(d *state, b []byte) {
 	for i := 0; len(b) >= 8; i++ {
 		binary.LittleEndian.PutUint64(b, d.a[i])