ignore newlines in script

Author: facontidavide

include/behaviortree_cpp/scripting/operators.hpp

@@ -806,7 +806,7 @@ struct stmt
   // This is because we can't easily know whether we need to request more input when seeing a
   // newline or not. Once we're having a e.g. parenthesized expression, we know that we need more
   // input until we've reached ), so then change the whitespace rule.
-  static constexpr auto whitespace = dsl::ascii::blank | escaped_newline;
+  static constexpr auto whitespace = dsl::ascii::blank | escaped_newline | dsl::newline;
 
   static constexpr auto rule = [] {
     // We can't use `dsl::eol` as our terminator directly,

tests/script_parser_test.cpp

@@ -381,3 +381,23 @@ TEST(ParserTest, Issue595)
   ASSERT_EQ(status, BT::NodeStatus::SUCCESS);
   ASSERT_EQ(0, counters[0]);
 }
+
+TEST(ParserTest, NewLine)
+{
+  BT::BehaviorTreeFactory factory;
+
+  const std::string xml_text = R"(
+  <root BTCPP_format="4" >
+    <BehaviorTree ID="Main">
+      <Script code="A:=5;&#10;B:=6"/>
+    </BehaviorTree>
+  </root> )";
+
+
+  auto tree = factory.createTreeFromText(xml_text);
+  const auto status = tree.tickWhileRunning();
+
+  ASSERT_EQ(status, BT::NodeStatus::SUCCESS);
+  ASSERT_EQ(tree.rootBlackboard()->get<int>("A"), 5);
+  ASSERT_EQ(tree.rootBlackboard()->get<int>("B"), 6);
+}