Variou details:

- Put the MIT copyright at the end.
- Move the directory /other -> tools
- Various improvements.

src/ftxui/dom/hbox_test.cpp

@@ -1,7 +1,3 @@
-// Copyright 2020 Arthur Sonzogni. All rights reserved.
-// Use of this source code is governed by the MIT license that can be found in
-// the LICENSE file.
-
 #include "ftxui/dom/elements.hpp"
 #include "ftxui/screen/screen.hpp"
 #include "gtest/gtest.h"
@@ -353,3 +349,7 @@ TEST(HBoxTest, FlexGrow_NoFlex_FlewShrink) {
     EXPECT_EQ(expectations[i], screen.ToString());
   }
 }
+
+// Copyright 2020 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.