Compiles the node to PHP.
Twig_Compiler A Twig_Compiler instance:
Overrides Twig_Node::compile
public function compile(Twig_Compiler $compiler) {
$compiler
->addDebugInfo($this)
->write("ob_start();\n")
->subcompile($this
->getNode('body'))
->write("echo trim(preg_replace('/>\\s+</', '><', ob_get_clean()));\n");
}