reflect: correct tpoy in comment

Change-Id: I75aef6bf957939fae8b680214f5923dc2713a5cc
Reviewed-on: https://go-review.googlesource.com/c/go/+/452935
Reviewed-by: Russ Cox <[email protected]>
Run-TryBot: Ian Lance Taylor <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Auto-Submit: Russ Cox <[email protected]>
Auto-Submit: Ian Lance Taylor <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
Run-TryBot: Ian Lance Taylor <[email protected]>

src/reflect/value.go

@@ -3344,7 +3344,7 @@ func (v Value) Equal(u Value) bool {
 		return false
 	}
 
-	// Handle ach Kind directly rather than calling valueInterface
+	// Handle each Kind directly rather than calling valueInterface
 	// to avoid allocating.
 	switch v.Kind() {
 	default: