### 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
int start_block = p_line.rfind("[codeblock]");
	int end_block = p_line.rfind("[/codeblock]");
	if (start_block != -1 && r_block_begins) {
		*r_block_begins = start_block;
	}
	if (p_already_in) {
		if (end_block == -1) {
			return true;
		} else if (start_block == -1) {
			return false;
		} else {
			return start_block > end_block;
		}
	} else {
		if (start_block == -1) {
			return false;
		} else if (end_block == -1) {
			return true;
		} else {
			return start_block > end_block;
		}
	}
}
bool GDScriptParser::has_comment(int p_line, bool p_must_be_doc) {