fix linter errs

Author: kpechenenko

hw08_envdir_tool/env_reader_test.go

@@ -1,9 +1,10 @@
 package main
 
 import (
-	"github.com/stretchr/testify/assert"
 	"os"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestReadDir(t *testing.T) {

hw08_envdir_tool/executor_test.go

@@ -1,8 +1,9 @@
 package main
 
 import (
-	"github.com/stretchr/testify/assert"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestRunCmd(t *testing.T) {