layout:decorator does not work correclty over multiple layers anymore #130
Description
while upgrading thymeleaf to 3 and thymeleaf-layout-dialect within a spring boot application, I noticed that templates behaves differently with multiple decorator layers. The merging logic also behaves different between 2.0.0 and 2.0.1, but both does not resemble the behavior from 1.4, which I think is a bug.
Heres a simple test case with 3 layout files:
layout1.html:
<!DOCTYPE HTML>
<html>
<head>
<script src="layout1.js"></script>
</head>
</html>layout2.html:
<!DOCTYPE HTML>
<html layout:decorator="layout1">
<head>
<script src="layout2.js"></script>
</head>
</html>test.html:
<!DOCTYPE HTML>
<html layout:decorator="layout2">
<head>
<script src="test.js"></script>
</head>
</html>The result with different combinations of thymeleaf and thymeleaf-layout-dialect versions:
Thymeleaf 2.1.5, Dialect 1.4.0
<!DOCTYPE HTML>
<html>
<head>
<script src="layout1.js"></script>
<script src="layout2.js"></script>
<script src="test.js"></script>
</head>
</html>Thymeleaf 3.0.0, Dialect 2.0.0
<!DOCTYPE HTML>
<html>
<head>
<script src="layout2.js"></script>
<script src="test.js"></script>
</head>
</html>Thymeleaf 3.0.0, Dialect 2.0.1
<!DOCTYPE HTML>
<html>
<head>
<script src="layout1.js"></script>
<script src="test.js"></script>
</head>
</html>The behavior also affects the merging of the body part, I just used the head with single script tags for simplicity of the test case.