Fix reversed Got/Expected in expectFileContent in docs_test.go (#1320)

docs_test.go

@@ -119,13 +119,13 @@ Should be a part of the same code block
 	return app
 }
 
-func expectFileContent(t *testing.T, file, expected string) {
+func expectFileContent(t *testing.T, file, got string) {
 	data, err := ioutil.ReadFile(file)
 	// Ignore windows line endings
 	// TODO: Replace with bytes.ReplaceAll when support for Go 1.11 is dropped
 	data = bytes.Replace(data, []byte("\r\n"), []byte("\n"), -1)
 	expect(t, err, nil)
-	expect(t, string(data), expected)
+	expect(t, got, string(data))
 }
 
 func TestToMarkdownFull(t *testing.T) {