chore: fix some comments

Signed-off-by: riskrole <yuhang@before.tech>

model/textparse/protobufparse.go

@@ -47,7 +47,7 @@ import (
 // the re-arrangement work is actually causing problems (which has to be seen),
 // that expectation needs to be changed.
 type ProtobufParser struct {
-	in        []byte // The intput to parse.
+	in        []byte // The input to parse.
 	inPos     int    // Position within the input.
 	metricPos int    // Position within Metric slice.
 	// fieldPos is the position within a Summary or (legacy) Histogram. -2
@@ -71,7 +71,7 @@ type ProtobufParser struct {
 
 	mf *dto.MetricFamily
 
-	// Wether to also parse a classic histogram that is also present as a
+	// Whether to also parse a classic histogram that is also present as a
 	// native histogram.
 	parseClassicHistograms bool
 

rules/alerting_test.go

@@ -648,7 +648,7 @@ func TestAlertingRuleLimit(t *testing.T) {
 		case err != nil:
 			require.EqualError(t, err, test.err)
 		case test.err != "":
-			t.Errorf("Expected errror %s, got none", test.err)
+			t.Errorf("Expected error %s, got none", test.err)
 		}
 	}
 }

tsdb/compact_test.go

@@ -2018,7 +2018,7 @@ func TestDelayedCompaction(t *testing.T) {
 				// This implies that the compaction delay doesn't block or wait on the initial trigger.
 				// 3 is an arbitrary value because it's difficult to determine the precise value.
 				require.GreaterOrEqual(t, prom_testutil.ToFloat64(db.metrics.compactionsTriggered)-prom_testutil.ToFloat64(db.metrics.compactionsSkipped), 3.0)
-				// The delay doesn't change the head blocks alignement.
+				// The delay doesn't change the head blocks alignment.
 				require.Eventually(t, func() bool {
 					return db.head.MinTime() == db.compactor.(*LeveledCompactor).ranges[0]+1
 				}, 500*time.Millisecond, 10*time.Millisecond)

tsdb/head_read.go

@@ -430,7 +430,7 @@ func (s *memSeries) chunk(id chunks.HeadChunkID, chunkDiskMapper *chunks.ChunkDi
 	// incremented by 1 when new chunk is created, hence (id - firstChunkID) gives the slice index.
 	// The max index for the s.mmappedChunks slice can be len(s.mmappedChunks)-1, hence if the ix
 	// is >= len(s.mmappedChunks), it represents one of the chunks on s.headChunks linked list.
-	// The order of elemens is different for slice and linked list.
+	// The order of elements is different for slice and linked list.
 	// For s.mmappedChunks slice newer chunks are appended to it.
 	// For s.headChunks list newer chunks are prepended to it.
 	//