Run goimports

contrib/mobile/mobile_android.go

@@ -1,3 +1,4 @@
+//go:build android
 // +build android
 
 package mobile

contrib/mobile/mobile_ios.go

@@ -1,3 +1,4 @@
+//go:build ios
 // +build ios
 
 package mobile

contrib/mobile/mobile_other.go

@@ -1,3 +1,4 @@
+//go:build !android && !ios
 // +build !android,!ios
 
 package mobile

src/core/debug.go

@@ -3,14 +3,16 @@
 
 package core
 
-import "fmt"
+import (
+	"fmt"
 
-import _ "net/http/pprof"
-import "net/http"
-import "runtime"
-import "os"
+	"net/http"
+	_ "net/http/pprof"
+	"os"
+	"runtime"
 
-import "github.com/gologme/log"
+	"github.com/gologme/log"
+)
 
 // Start the profiler in debug builds, if the required environment variable is set.
 func init() {

src/multicast/multicast_unix.go

@@ -3,8 +3,11 @@
 
 package multicast
 
-import "syscall"
-import "golang.org/x/sys/unix"
+import (
+	"syscall"
+
+	"golang.org/x/sys/unix"
+)
 
 func (m *Multicast) _multicastStarted() {
 

src/multicast/multicast_windows.go

@@ -3,8 +3,11 @@
 
 package multicast
 
-import "syscall"
-import "golang.org/x/sys/windows"
+import (
+	"syscall"
+
+	"golang.org/x/sys/windows"
+)
 
 func (m *Multicast) _multicastStarted() {