### Godot version

4.0.2

### System information

Ubuntu 22.04.1 LTS

### Issue description

So far I've found these ones:

![Screenshot from 2023-05-10 17-56-42](https://github.com/godotengine/godot/assets/85438892/b161b14a-cb7d-46fe-8398-816bf354a929)
![Screenshot from 2023-05-10 18-01-02](https://github.com/godotengine/godot/assets/85438892/b0fefcfb-4246-4ebb-ae7b-dd798d7a1d63)

But there are likely more like them. They are invalid, at least in the context I encountered them here (at the beginning of a regular line of script)

### Steps to reproduce

Type `Anchor` in the code editor.

### Minimal reproduction project

N/A
} else {
			arghint += par->identifier->name.operator String() + ": " + par->get_datatype().to_string();
		}
		if (par->initializer) {
			String def_val = "<unknown>";
			switch (par->initializer->type) {
				case GDScriptParser::Node::LITERAL: {
					const GDScriptParser::LiteralNode *literal = static_cast<const GDScriptParser::LiteralNode *>(par->initializer);
					def_val = literal->value.get_construct_string();
				} break;
				case GDScriptParser::Node::IDENTIFIER: {
					const GDScriptParser::IdentifierNode *id = static_cast<const GDScriptParser::IdentifierNode *>(par->initializer);
					def_val = id->name.operator String();
				} break;
				case GDScriptParser::Node::CALL: {
					const GDScriptParser::CallNode *call = static_cast<const GDScriptParser::CallNode *>(par->initializer);
					if (call->is_constant && call->reduced) {
						def_val = call->function_name.operator String() + call->reduced_value.operator String();
					}
				} break;
				case GDScriptParser::Node::ARRAY: {
					const GDScriptParser::ArrayNode *arr = static_cast<const GDScriptParser::ArrayNode *>(par->initializer);
					if (arr->is_constant && arr->reduced) {
						def_val = arr->reduced_value.operator String();
					}
				} break;
				case GDScriptParser::Node::DICTIONARY: {
					const GDScriptParser::DictionaryNode *dict = static_cast<const GDScriptParser::DictionaryNode *>(par->initializer);
					if (dict->is_constant && dict->reduced) {
						def_val = dict->reduced_value.operator String();