### 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
type->type_chain.push_back(type_element);
	if (match(GDScriptTokenizer::Token::BRACKET_OPEN)) {
		
		type->container_type = parse_type(false); 
		if (type->container_type == nullptr) {
			push_error(R"(Expected type for collection after "[".)");
			complete_extents(type);
			type = nullptr;
		} else if (type->container_type->container_type != nullptr) {
			push_error("Nested typed collections are not supported.");
		}
		consume(GDScriptTokenizer::Token::BRACKET_CLOSE, R"(Expected closing "]" after collection type.)");
		if (type != nullptr) {
			complete_extents(type);
		}
		return type;
	}
	int chain_index = 1;
	while (match(GDScriptTokenizer::Token::PERIOD)) {
		make_completion_context(COMPLETION_TYPE_ATTRIBUTE, type, chain_index++);
		if (consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected inner type name after ".".)")) {
			type_element = parse_identifier();
			type->type_chain.push_back(type_element);
		}
	}
	complete_extents(type);
	return type;
}
#ifdef TOOLS_ENABLED
static bool _in_codeblock(String p_line, bool p_already_in, int *r_block_begins = nullptr) {