metrics: fix mismatched names in comments (ethereum#29348)

Author: gzliudan

metrics/gauge.go

@@ -74,7 +74,7 @@ func (g *StandardGauge) Update(v int64) {
 	g.value.Store(v)
 }
 
-// Update updates the gauge's value if v is larger then the current value.
+// UpdateIfGt updates the gauge's value if v is larger then the current value.
 func (g *StandardGauge) UpdateIfGt(v int64) {
 	for {
 		exist := g.value.Load()

metrics/meter.go

@@ -173,7 +173,7 @@ type meterArbiter struct {
 
 var arbiter = meterArbiter{ticker: time.NewTicker(5 * time.Second), meters: make(map[*StandardMeter]struct{})}
 
-// Ticks meters on the scheduled interval
+// tick meters on the scheduled interval
 func (ma *meterArbiter) tick() {
 	for range ma.ticker.C {
 		ma.tickMeters()

metrics/metrics.go

@@ -30,7 +30,7 @@ var enablerFlags = []string{"metrics"}
 // enablerEnvVars is the env var names to use to enable metrics collections.
 var enablerEnvVars = []string{"XDC_METRICS"}
 
-// Init enables or disables the metrics system. Since we need this to run before
+// init enables or disables the metrics system. Since we need this to run before
 // any other code gets to create meters and timers, we'll actually do an ugly hack
 // and peek into the command line args for the metrics flag.
 func init() {