doc: fix example errors.

Author: ghosind

all_test.go

@@ -244,7 +244,7 @@ func ExampleAllCompleted() {
 	})
 	fmt.Println(out)
 	fmt.Println(err)
-	// Outputs:
+	// Output:
 	// [[1 <nil>] [expected error]]
 	// function 1 error: expected error
 }

parallel_test.go

@@ -157,7 +157,6 @@ func BenchmarkParallel(b *testing.B) {
 }
 
 func ExampleParallel() {
-	start := time.Now()
 	out, err := async.Parallel(2, func() int {
 		time.Sleep(50 * time.Millisecond)
 		return 1
@@ -168,11 +167,9 @@ func ExampleParallel() {
 		time.Sleep(50 * time.Millisecond)
 		return 3
 	})
-	fmt.Println(time.Since(start))
 	fmt.Println(out)
 	fmt.Println(err)
-	// Outputs:
-	// 101.210974ms
+	// Output:
 	// [[1] [2] [3]]
 	// <nil>
 }
@@ -336,7 +333,6 @@ func BenchmarkParallelCompleted(b *testing.B) {
 }
 
 func ExampleParallelCompleted() {
-	start := time.Now()
 	out, err := async.ParallelCompleted(2, func() int {
 		time.Sleep(50 * time.Millisecond)
 		return 1
@@ -347,11 +343,9 @@ func ExampleParallelCompleted() {
 		time.Sleep(50 * time.Millisecond)
 		return 3
 	})
-	fmt.Println(time.Since(start))
 	fmt.Println(out)
 	fmt.Println(err)
-	// Outputs:
-	// 101.210974ms
+	// Output:
 	// [[1] [expected error] [3]]
 	// function 1 error: expected error
 }

race_test.go

@@ -132,20 +132,17 @@ func BenchmarkRace(b *testing.B) {
 }
 
 func ExampleRace() {
-	start := time.Now()
 	out, index, err := async.Race(func() int {
 		time.Sleep(50 * time.Millisecond)
 		return 1
 	}, func() int {
 		time.Sleep(20 * time.Millisecond)
 		return 2
 	})
-	fmt.Println(time.Since(start))
 	fmt.Println(out)
 	fmt.Println(index)
 	fmt.Println(err)
-	// Outputs:
-	// 20.678486ms
+	// Output:
 	// [2]
 	// 1
 	// <nil>

retry_test.go

@@ -153,7 +153,7 @@ func ExampleRetry() {
 	fmt.Println(i)
 	fmt.Println(out)
 	fmt.Println(err)
-	// Outputs:
+	// Output:
 	// 3
 	// [<nil>]
 	// <nil>

until_test.go

@@ -123,7 +123,7 @@ func ExampleUntil() {
 	fmt.Println(i)
 	fmt.Println(out)
 	fmt.Println(err)
-	// Outputs:
+	// Output:
 	// 3
 	// [3]
 	// <nil>

while_test.go

@@ -112,7 +112,7 @@ func ExampleWhile() {
 	fmt.Println(i)
 	fmt.Println(out)
 	fmt.Println(err)
-	// Outputs:
+	// Output:
 	// 3
 	// []
 	// <nil>