### 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
p_node->end_line = previous.end_line;
	p_node->end_column = previous.end_column;
	p_node->leftmost_column = MIN(p_node->leftmost_column, previous.leftmost_column);
	p_node->rightmost_column = MAX(p_node->rightmost_column, previous.rightmost_column);
}
void GDScriptParser::reset_extents(Node *p_node, GDScriptTokenizer::Token p_token) {
	p_node->start_line = p_token.start_line;
	p_node->end_line = p_token.end_line;
	p_node->start_column = p_token.start_column;
	p_node->end_column = p_token.end_column;
	p_node->leftmost_column = p_token.leftmost_column;
	p_node->rightmost_column = p_token.rightmost_column;
}
void GDScriptParser::reset_extents(Node *p_node, Node *p_from) {
	if (p_from == nullptr) {
		return;
	}
	p_node->start_line = p_from->start_line;
	p_node->end_line = p_from->end_line;
	p_node->start_column = p_from->start_column;
	p_node->end_column = p_from->end_column;
	p_node->leftmost_column = p_from->leftmost_column;
	p_node->rightmost_column = p_from->rightmost_column;
}
#ifdef DEBUG_ENABLED
void GDScriptParser::TreePrinter::increase_indent() {