refactor: run gofumpt -l -extra -w .

Author: Denys Vitali

examples/metric/metrics/main.go

@@ -3,14 +3,15 @@ package main
 import (
 	"context"
 	"fmt"
-	"github.com/prometheus/client_golang/prometheus/promhttp"
-	"go.opentelemetry.io/otel/metric/global"
-	"go.opentelemetry.io/otel/sdk/metric"
 	"math/rand"
 	"net/http"
 	"os"
 	"time"
 
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+	"go.opentelemetry.io/otel/metric/global"
+	"go.opentelemetry.io/otel/sdk/metric"
+
 	runtimemetrics "go.opentelemetry.io/contrib/instrumentation/runtime"
 	"go.opentelemetry.io/otel"
 	"go.opentelemetry.io/otel/exporters/jaeger"