`chunks.Reader`: Fix typo in ChunkOrIterable doc string.

Also fix comment typo in `FloatHistogram.Sub`.

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

model/histogram/float_histogram.go

@@ -303,7 +303,7 @@ func (h *FloatHistogram) Sub(other *FloatHistogram) *FloatHistogram {
 	)
 
 	if other.Schema < h.Schema {
-		panic(fmt.Errorf("cannot subtract histigram with schema %d to %d", other.Schema, h.Schema))
+		panic(fmt.Errorf("cannot subtract histogram with schema %d to %d", other.Schema, h.Schema))
 	} else if other.Schema > h.Schema {
 		otherPositiveSpans, otherPositiveBuckets = reduceResolution(otherPositiveSpans, otherPositiveBuckets, other.Schema, h.Schema, false, false)
 		otherNegativeSpans, otherNegativeBuckets = reduceResolution(otherNegativeSpans, otherNegativeBuckets, other.Schema, h.Schema, false, false)

tsdb/chunks/chunks.go

@@ -671,7 +671,7 @@ func (s *Reader) Size() int64 {
 	return s.size
 }
 
-// Chunk returns a chunk from a given reference.
+// ChunkOrIterable returns a chunk from a given reference.
 func (s *Reader) ChunkOrIterable(meta Meta) (chunkenc.Chunk, chunkenc.Iterable, error) {
 	sgmIndex, chkStart := BlockChunkRef(meta.Ref).Unpack()