### 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
ERR_FAIL_COND(p_source == nullptr);
	if (is_ignoring_warnings) {
		return;
	}
	if (GLOBAL_GET("debug/gdscript/warnings/exclude_addons").booleanize() && script_path.begins_with("res://addons/")) {
		return;
	}
	if (ignored_warnings.has(p_code)) {
		return;
	}
	int warn_level = (int)GLOBAL_GET(GDScriptWarning::get_settings_path_from_code(p_code));
	if (!warn_level) {
		return;
	}
	GDScriptWarning warning;
	warning.code = p_code;
	warning.symbols = p_symbols;
	warning.start_line = p_source->start_line;
	warning.end_line = p_source->end_line;
	warning.leftmost_column = p_source->leftmost_column;
	warning.rightmost_column = p_source->rightmost_column;
	if (warn_level == GDScriptWarning::WarnLevel::ERROR) {
		push_error(warning.get_message() + String(" (Warning treated as error.)"), p_source);
		return;
	}
	List<GDScriptWarning>::Element *before = nullptr;
	for (List<GDScriptWarning>::Element *E = warnings.front(); E; E = E->next()) {