### 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
if (path_state != PATH_STATE_START && path_state != PATH_STATE_SLASH) {
				push_error(R"("%" is only valid in the beginning of a node name (either after "$" or after "/"))");
				complete_extents(get_node);
				return nullptr;
			}
			get_node->full_path += "%";
			path_state = PATH_STATE_PERCENT;
		} else if (previous.type == GDScriptTokenizer::Token::SLASH) {
			if (path_state != PATH_STATE_START && path_state != PATH_STATE_NODE_NAME) {
				push_error(R"("/" is only valid at the beginning of the path or after a node name.)");
				complete_extents(get_node);
				return nullptr;
			}
			get_node->full_path += "/";
			path_state = PATH_STATE_SLASH;
		}
		make_completion_context(COMPLETION_GET_NODE, get_node, context_argument++);
		if (match(GDScriptTokenizer::Token::LITERAL)) {
			if (previous.literal.get_type() != Variant::STRING) {
				String previous_token;
				switch (path_state) {
					case PATH_STATE_START:
						previous_token = "$";
						break;
					case PATH_STATE_PERCENT:
						previous_token = "%";
						break;
					case PATH_STATE_SLASH:
						previous_token = "/";
						break;