internal/weak: remove unnecessary conversion, fix typo

Remove unnecessary conversion from unsafe.Pointer to unsafe.Pointer.
Also fix small typo in weak.Pointer.Strong method documentation.

Change-Id: I84791fba244581bd6218c589827a61914f0797b4
GitHub-Last-Rev: 7978d07d5bbd72ca84c9650bf2450d7a269bbb1d
GitHub-Pull-Request: golang/go#66977
Reviewed-on: https://go-review.googlesource.com/c/go/+/580936
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Commit-Queue: Ian Lance Taylor <iant@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Joedian Reid <joedian@google.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
diff --git a/src/internal/weak/pointer.go b/src/internal/weak/pointer.go
index 44d2673..8e05af2 100644
--- a/src/internal/weak/pointer.go
+++ b/src/internal/weak/pointer.go
@@ -68,10 +68,10 @@
 // Strong creates a strong pointer from the weak pointer.
 // Returns nil if the original value for the weak pointer was reclaimed by
 // the garbage collector.
-// If a weak pointer points to an object with a finalizer, thhen Strong will
+// If a weak pointer points to an object with a finalizer, then Strong will
 // return nil as soon as the object's finalizer is queued for execution.
 func (p Pointer[T]) Strong() *T {
-	return (*T)(runtime_makeStrongFromWeak(unsafe.Pointer(p.u)))
+	return (*T)(runtime_makeStrongFromWeak(p.u))
 }
 
 // Implemented in runtime.