metrics: fix some typos (ethereum#25551)

Author: gzliudan

metrics/gauge_float64_test.go

@@ -2,7 +2,7 @@ package metrics
 
 import "testing"
 
-func BenchmarkGuageFloat64(b *testing.B) {
+func BenchmarkGaugeFloat64(b *testing.B) {
 	g := NewGaugeFloat64()
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {

metrics/gauge_test.go

@@ -5,7 +5,7 @@ import (
 	"testing"
 )
 
-func BenchmarkGuage(b *testing.B) {
+func BenchmarkGauge(b *testing.B) {
 	g := NewGauge()
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {

metrics/prometheus/prometheus.go

@@ -36,7 +36,7 @@ func Handler(reg metrics.Registry) http.Handler {
 		})
 		sort.Strings(names)
 
-		// Aggregate all the metris into a Prometheus collector
+		// Aggregate all the metrics into a Prometheus collector
 		c := newCollector()
 
 		for _, name := range names {

miner/unconfirmed_test.go

@@ -72,7 +72,7 @@ func TestUnconfirmedShifts(t *testing.T) {
 	if n := pool.blocks.Len(); n != int(limit)/2 {
 		t.Errorf("unconfirmed count mismatch: have %d, want %d", n, limit/2)
 	}
-	// Try to shift all the remaining blocks out and verify emptyness
+	// Try to shift all the remaining blocks out and verify emptiness
 	pool.Shift(start + 2*uint64(limit))
 	if n := pool.blocks.Len(); n != 0 {
 		t.Errorf("unconfirmed count mismatch: have %d, want %d", n, 0)