errgroup: fix some typos in comment

Change-Id: I3dd6df0eb2cc592f8811935cbcbca54a0d9304ce
Reviewed-on: https://go-review.googlesource.com/c/sync/+/713400
Reviewed-by: Alan Donovan <adonovan@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>
Auto-Submit: Alan Donovan <adonovan@google.com>

Author: cuishuang

errgroup/errgroup.go

@@ -3,7 +3,7 @@
 // license that can be found in the LICENSE file.
 
 // Package errgroup provides synchronization, error propagation, and Context
-// cancelation for groups of goroutines working on subtasks of a common task.
+// cancellation for groups of goroutines working on subtasks of a common task.
 //
 // [errgroup.Group] is related to [sync.WaitGroup] but adds handling of tasks
 // returning errors.

errgroup/errgroup_test.go

@@ -222,7 +222,7 @@ func TestTryGo(t *testing.T) {
 	g.SetLimit(0)
 	for i := 0; i < 1<<10; i++ {
 		if g.TryGo(fn) {
-			t.Fatalf("TryGo should fail but got succeded.")
+			t.Fatalf("TryGo should fail but got succeeded.")
 		}
 	}
 	g.Wait()