### 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
break;
			case GDScriptTokenizer::Token::LITERAL:
				if (current.literal.get_type() == Variant::STRING) {
					
					advance();
					if (!match(GDScriptTokenizer::Token::NEWLINE)) {
						push_error("Expected newline after comment string.");
					}
					break;
				}
				[[fallthrough]];
			default:
				
				make_completion_context(COMPLETION_IDENTIFIER, nullptr);
				push_error(vformat(R"(Unexpected "%s" in class body.)", current.get_name()));
				advance();
				break;
		}
		if (token.type != GDScriptTokenizer::Token::STATIC) {
			next_is_static = false;
		}
		if (panic_mode) {
			synchronize();
		}
		if (!p_is_multiline) {
			class_end = true;
		}
	}
}
GDScriptParser::VariableNode *GDScriptParser::parse_variable(bool p_is_static) {