[test] add Neon node re-print tests for list

tests/Neon/Node.printer.phpt

@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+use Nette\Neon\Lexer;
+use Nette\Neon\Parser;
+use Tester\Assert;
+
+require __DIR__ . '/../bootstrap.php';
+
+$lexer = new Lexer();
+$fileContents = file_get_contents(__DIR__ . '/fixtures/nested-list.neon');
+$tokens = $lexer->tokenize($fileContents);
+
+$parser = new Parser();
+$node = $parser->parse($tokens);
+
+$reprintedNode = $node->toString();
+
+// this is current incorrect behavior
+Assert::matchFile(
+	__DIR__ . '/fixtures/nested-list-actualy-reprint.neon',
+	$reprintedNode
+);
+
+Assert::matchFile(
+	__DIR__ . '/fixtures/nested-list.neon',
+	$reprintedNode
+);
+

tests/Neon/fixtures/nested-list-actualy-reprint.neon

@@ -0,0 +1,2 @@
+services:
+key: value

tests/Neon/fixtures/nested-list.neon

@@ -0,0 +1,2 @@
+services:
+    key: value