### 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
AnnotationNode *last_annotation = annotation_stack.back()->get();
		if (last_annotation->applies_to(p_target)) {
			annotations.push_front(last_annotation);
			annotation_stack.pop_back();
		} else {
			push_error(vformat(R"(Annotation "%s" cannot be applied to a %s.)", last_annotation->name, p_member_kind));
			clear_unused_annotations();
		}
#ifdef TOOLS_ENABLED
		if (last_annotation->start_line == doc_comment_line) {
			doc_comment_line--;
		}
#endif 
	}
	T *member = (this->*p_parse_function)(p_is_static);
	if (member == nullptr) {
		return;
	}
	for (AnnotationNode *&annotation : annotations) {
		member->annotations.push_back(annotation);
	}
#ifdef TOOLS_ENABLED
	
	class_doc_line = MIN(class_doc_line, doc_comment_line - 1);
	
	if (has_comment(previous.start_line, true)) {
		member->doc_description = get_doc_comment(previous.start_line, true);
	} else if (has_comment(doc_comment_line, true)) {
		if constexpr (std::is_same_v<T, ClassNode>) {
			get_class_doc_comment(doc_comment_line, member->doc_brief_description, member->doc_description, member->doc_tutorials, true);