metrics: fix docstring names (#28923)

metrics/counter.go

@@ -8,7 +8,7 @@ type CounterSnapshot interface {
 	Count() int64
 }
 
-// Counters hold an int64 value that can be incremented and decremented.
+// Counter hold an int64 value that can be incremented and decremented.
 type Counter interface {
 	Clear()
 	Dec(int64)

metrics/gauge.go

@@ -2,12 +2,12 @@ package metrics
 
 import "sync/atomic"
 
-// gaugeSnapshot contains a readonly int64.
+// GaugeSnapshot contains a readonly int64.
 type GaugeSnapshot interface {
 	Value() int64
 }
 
-// Gauges hold an int64 value that can be set arbitrarily.
+// Gauge holds an int64 value that can be set arbitrarily.
 type Gauge interface {
 	Snapshot() GaugeSnapshot
 	Update(int64)

metrics/gauge_float64.go

@@ -48,7 +48,7 @@ type gaugeFloat64Snapshot float64
 // Value returns the value at the time the snapshot was taken.
 func (g gaugeFloat64Snapshot) Value() float64 { return float64(g) }
 
-// NilGauge is a no-op Gauge.
+// NilGaugeFloat64 is a no-op Gauge.
 type NilGaugeFloat64 struct{}
 
 func (NilGaugeFloat64) Snapshot() GaugeFloat64Snapshot { return NilGaugeFloat64{} }

metrics/gauge_info.go

@@ -9,7 +9,7 @@ type GaugeInfoSnapshot interface {
 	Value() GaugeInfoValue
 }
 
-// GaugeInfos hold a GaugeInfoValue value that can be set arbitrarily.
+// GaugeInfo holds a GaugeInfoValue value that can be set arbitrarily.
 type GaugeInfo interface {
 	Update(GaugeInfoValue)
 	Snapshot() GaugeInfoSnapshot

metrics/healthcheck.go

@@ -1,6 +1,6 @@
 package metrics
 
-// Healthchecks hold an error value describing an arbitrary up/down status.
+// Healthcheck holds an error value describing an arbitrary up/down status.
 type Healthcheck interface {
 	Check()
 	Error() error

metrics/histogram.go

@@ -4,7 +4,7 @@ type HistogramSnapshot interface {
 	SampleSnapshot
 }
 
-// Histograms calculate distribution statistics from a series of int64 values.
+// Histogram calculates distribution statistics from a series of int64 values.
 type Histogram interface {
 	Clear()
 	Update(int64)

metrics/influxdb/influxdbv2.go

@@ -25,7 +25,7 @@ type v2Reporter struct {
 	write  api.WriteAPI
 }
 
-// InfluxDBWithTags starts a InfluxDB reporter which will post the from the given metrics.Registry at each d interval with the specified tags
+// InfluxDBV2WithTags starts a InfluxDB reporter which will post the from the given metrics.Registry at each d interval with the specified tags
 func InfluxDBV2WithTags(r metrics.Registry, d time.Duration, endpoint string, token string, bucket string, organization string, namespace string, tags map[string]string) {
 	rep := &v2Reporter{
 		reg:          r,

metrics/sample.go

@@ -148,13 +148,13 @@ func (NilSample) Clear()                   {}
 func (NilSample) Snapshot() SampleSnapshot { return (*emptySnapshot)(nil) }
 func (NilSample) Update(v int64)           {}
 
-// SamplePercentiles returns an arbitrary percentile of the slice of int64.
+// SamplePercentile returns an arbitrary percentile of the slice of int64.
 func SamplePercentile(values []int64, p float64) float64 {
 	return CalculatePercentiles(values, []float64{p})[0]
 }
 
 // CalculatePercentiles returns a slice of arbitrary percentiles of the slice of
-// int64. This method returns interpolated results, so e.g if there are only two
+// int64. This method returns interpolated results, so e.g. if there are only two
 // values, [0, 10], a 50% percentile will land between them.
 //
 // Note: As a side-effect, this method will also sort the slice of values.