remove repetitive words (#12556)

Signed-off-by: cui fliter <imcusg@gmail.com>

model/histogram/float_histogram.go

@@ -421,7 +421,7 @@ func addBucket(
 // receiving histogram, but a pointer to it is returned for convenience.
 //
 // The ideal value for maxEmptyBuckets depends on circumstances. The motivation
-// to set maxEmptyBuckets > 0 is the assumption that is is less overhead to
+// to set maxEmptyBuckets > 0 is the assumption that is less overhead to
 // represent very few empty buckets explicitly within one span than cutting the
 // one span into two to treat the empty buckets as a gap between the two spans,
 // both in terms of storage requirement as well as in terms of encoding and

promql/value.go

@@ -214,7 +214,7 @@ func (s Sample) MarshalJSON() ([]byte, error) {
 	return json.Marshal(h)
 }
 
-// Vector is basically only an an alias for []Sample, but the contract is that
+// Vector is basically only an alias for []Sample, but the contract is that
 // in a Vector, all Samples have the same timestamp.
 type Vector []Sample
 

tsdb/ooo_head_read.go

@@ -137,7 +137,7 @@ func (oh *OOOHeadIndexReader) series(ref storage.SeriesRef, builder *labels.Scra
 	// chunks Meta the first chunk that overlaps with others.
 	// Example chunks of a series: 5:(100, 200) 6:(500, 600) 7:(150, 250) 8:(550, 650)
 	// In the example 5 overlaps with 7 and 6 overlaps with 8 so we only want to
-	// to return chunk Metas for chunk 5 and chunk 6e
+	// return chunk Metas for chunk 5 and chunk 6e
 	*chks = append(*chks, tmpChks[0])
 	maxTime := tmpChks[0].MaxTime // Tracks the maxTime of the previous "to be merged chunk".
 	for _, c := range tmpChks[1:] {