fix some comments typos (#4059)

cmd/prometheus/main_test.go

@@ -59,7 +59,7 @@ func TestMain(m *testing.M) {
 	os.Exit(exitCode)
 }
 
-// As soon as prometheus starts responding to http request should be able to accept Interrupt signals for a gracefull shutdown.
+// As soon as prometheus starts responding to http request should be able to accept Interrupt signals for a graceful shutdown.
 func TestStartupInterrupt(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skipping test in short mode.")

rules/manager.go

@@ -81,7 +81,7 @@ var (
 	})
 	lastDuration = prometheus.NewDesc(
 		prometheus.BuildFQName(namespace, "", "rule_group_last_duration_seconds"),
-		"The duration of the last rule group evaulation.",
+		"The duration of the last rule group evaluation.",
 		[]string{"rule_group"},
 		nil,
 	)

scrape/scrape_test.go

@@ -434,7 +434,7 @@ func TestScrapeLoopStop(t *testing.T) {
 	if len(appender.result) < 5*3 || len(appender.result)%5 != 0 {
 		t.Fatalf("Expected at least 3 scrapes with 4 samples each, got %d samples", len(appender.result))
 	}
-	// All samples in a scrape must have the same timestmap.
+	// All samples in a scrape must have the same timestamp.
 	var ts int64
 	for i, s := range appender.result {
 		if i%5 == 0 {

storage/remote/codec.go

@@ -200,7 +200,7 @@ func (c *concreteSeriesSet) Err() error {
 	return nil
 }
 
-// concreteSeries implementes storage.Series.
+// concreteSeries implements storage.Series.
 type concreteSeries struct {
 	labels  labels.Labels
 	samples []*prompb.Sample

storage/remote/queue_manager.go

@@ -477,7 +477,7 @@ func (s *shards) sendSamples(samples model.Samples) {
 	begin := time.Now()
 	s.sendSamplesWithBackoff(samples)
 
-	// These counters are used to caclulate the dynamic sharding, and as such
+	// These counters are used to calculate the dynamic sharding, and as such
 	// should be maintained irrespective of success or failure.
 	s.qm.samplesOut.incr(int64(len(samples)))
 	s.qm.samplesOutDuration.incr(int64(time.Since(begin)))

web/api/v2/api.go

@@ -135,7 +135,7 @@ func labelsToProto(lset labels.Labels) pb.Labels {
 }
 
 // AdminDisabled implements the administration interface that informs
-// that the API endpoints are disbaled.
+// that the API endpoints are disabled.
 type AdminDisabled struct {
 }