cleanup: fix some typos in code comment (#1444)

Signed-off-by: Guangming Wang <[email protected]>

pkg/compact/downsample/downsample.go

@@ -191,15 +191,15 @@ func targetChunkCount(mint, maxt, inRes, outRes int64, count int) (x int) {
 	return x
 }
 
-// aggregator collects commulative stats for a stream of values.
+// aggregator collects cumulative stats for a stream of values.
 type aggregator struct {
 	total   int     // total samples processed
 	count   int     // samples in current window
 	sum     float64 // value sum of current window
 	min     float64 // min of current window
 	max     float64 // max of current window
 	counter float64 // total counter state since beginning
-	resets  int     // number of counter resests since beginning
+	resets  int     // number of counter resets since beginning
 	last    float64 // last added value
 }
 

pkg/promclient/promclient.go

@@ -403,7 +403,7 @@ func PromqlQueryInstant(ctx context.Context, logger log.Logger, base *url.URL, q
 func convertScalarJSONToVector(scalarJSONResult json.RawMessage) (model.Vector, error) {
 	var (
 		// Do not specify exact length of the expected slice since JSON unmarshaling
-		// would make the leght fit the size and we won't be able to check the length afterwards.
+		// would make the length fit the size and we won't be able to check the length afterwards.
 		resultPointSlice []json.RawMessage
 		resultTime       model.Time
 		resultValue      model.SampleValue

pkg/shipper/shipper.go

@@ -438,7 +438,7 @@ func hardlinkBlock(src, dst string) error {
 	return nil
 }
 
-// Meta defines the fomart thanos.shipper.json file that the shipper places in the data directory.
+// Meta defines the format thanos.shipper.json file that the shipper places in the data directory.
 type Meta struct {
 	Version  int         `json:"version"`
 	Uploaded []ulid.ULID `json:"uploaded"`

pkg/ui/rule.go

@@ -95,7 +95,7 @@ func ruleTmplFuncs(queryURL string) template.FuncMap {
 				if minutes != 0 {
 					return fmt.Sprintf("%s%dm %ds", sign, minutes, seconds)
 				}
-				// For seconds, we display 4 significant digts.
+				// For seconds, we display 4 significant digits.
 				return fmt.Sprintf("%s%.4gs", sign, v)
 			}
 			prefix := ""