Correct whitespace.

Author: happygiraffe

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+  "git.enabled": false
+}

roaring64/serialization_test.go

@@ -113,7 +113,7 @@ func TestSerializationToFile038(t *testing.T) {
 	buf := bytes.NewBuffer(nil)
 	teer := io.TeeReader(fin, buf)
 
-	defer 		fin.Close()
+	defer fin.Close()
 
 	_, _ = newrb.ReadFrom(teer)
 	assert.True(t, rb.Equals(newrb))