### Godot version

v4.0.stable.official [92bee43ad]

### System information

Steam OS Holo, Steam Deck

### Issue description

Using a `[br]` tag at the end of a line in a documentation comment adds an additional space at the beginning of the following line:

![image](https://user-images.githubusercontent.com/857660/236700815-c78a317f-cdf8-4f3c-8489-41f9559ffe6d.png)


### Steps to reproduce

The script below is what I used to generate the image above:

```gdscript
class_name Test
extends Node

## High-level description
##
## First line of detail.[br]
## Second line of detail.
```

Removing the space between `##` and `Second` doesn't change the output.

The only workaround I've found so far is to remove the linebreak after the `[br]` tag, but this makes the documentation comments harder to read in the editor:

```gdscript
class_name Test
extends Node

## High-level description
##
## First line of detail.[br]Second line of detail.
```

### Minimal reproduction project

N/A
push_line("{");
	increase_indent();
	for (int i = 0; i < p_dictionary->elements.size(); i++) {
		print_expression(p_dictionary->elements[i].key);
		if (p_dictionary->style == DictionaryNode::PYTHON_DICT) {
			push_text(" : ");
		} else {
			push_text(" = ");
		}
		print_expression(p_dictionary->elements[i].value);
		push_line(" ,");
	}
	decrease_indent();
	push_text("}");
}
void GDScriptParser::TreePrinter::print_expression(ExpressionNode *p_expression) {
	if (p_expression == nullptr) {
		push_text("<invalid expression>");