Format code and fix go vet (#2696)

* run go fix ./...

Signed-off-by: Tiago Peczenyj <tpeczenyj@weborama.com>

* run make fmt

Signed-off-by: Tiago Peczenyj <tpeczenyj@weborama.com>

* fix go vet ./... issues

* Update README.md

Reorder imports with the rules defined in the Makefile 

as if we run `make fmt`

* run gofumpt -w .

* update Makefile to use gofumpt instead gofmt

* increment makefile

* format test

* format tests

Signed-off-by: Tiago Peczenyj <tpeczenyj@weborama.com>

---------

Signed-off-by: Tiago Peczenyj <tpeczenyj@weborama.com>
Co-authored-by: ofekshenawa <104765379+ofekshenawa@users.noreply.github.com>

internal/customvet/checks/setval/setval.go

@@ -4,6 +4,7 @@ import (
 	"go/ast"
 	"go/token"
 	"go/types"
+
 	"golang.org/x/tools/go/analysis"
 )
 

internal/customvet/checks/setval/setval_test.go

@@ -3,8 +3,9 @@ package setval_test
 import (
 	"testing"
 
-	"github.com/redis/go-redis/internal/customvet/checks/setval"
 	"golang.org/x/tools/go/analysis/analysistest"
+
+	"github.com/redis/go-redis/internal/customvet/checks/setval"
 )
 
 func Test(t *testing.T) {

internal/customvet/main.go

@@ -1,8 +1,9 @@
 package main
 
 import (
-	"github.com/redis/go-redis/internal/customvet/checks/setval"
 	"golang.org/x/tools/go/analysis/multichecker"
+
+	"github.com/redis/go-redis/internal/customvet/checks/setval"
 )
 
 func main() {

internal/pool/conn_check.go

@@ -1,5 +1,4 @@
 //go:build linux || darwin || dragonfly || freebsd || netbsd || openbsd || solaris || illumos
-// +build linux darwin dragonfly freebsd netbsd openbsd solaris illumos
 
 package pool
 

internal/pool/conn_check_dummy.go

@@ -1,5 +1,4 @@
 //go:build !linux && !darwin && !dragonfly && !freebsd && !netbsd && !openbsd && !solaris && !illumos
-// +build !linux,!darwin,!dragonfly,!freebsd,!netbsd,!openbsd,!solaris,!illumos
 
 package pool
 

internal/pool/conn_check_test.go

@@ -1,5 +1,4 @@
 //go:build linux || darwin || dragonfly || freebsd || netbsd || openbsd || solaris || illumos
-// +build linux darwin dragonfly freebsd netbsd openbsd solaris illumos
 
 package pool
 

internal/util/safe.go

@@ -1,5 +1,4 @@
 //go:build appengine
-// +build appengine
 
 package util
 

internal/util/unsafe.go

@@ -1,5 +1,4 @@
 //go:build !appengine
-// +build !appengine
 
 package util