### 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 (class_name != StringName() && native_base != StringName() && ClassDB::is_parent_class(native_base, SNAME("Resource"))) {
					variable->export_info.type = Variant::OBJECT;
					variable->export_info.hint = PROPERTY_HINT_RESOURCE_TYPE;
					variable->export_info.hint_string = class_name;
				}
			} break;
			case GDScriptParser::DataType::ENUM: {
				variable->export_info.type = Variant::INT;
				variable->export_info.hint = PROPERTY_HINT_ENUM;
				String enum_hint_string;
				bool first = true;
				for (const KeyValue<StringName, int64_t> &E : export_type.enum_values) {
					if (!first) {
						enum_hint_string += ",";
					} else {
						first = false;
					}
					enum_hint_string += E.key.operator String().capitalize().xml_escape();
					enum_hint_string += ":";
					enum_hint_string += String::num_int64(E.value).xml_escape();
				}
				variable->export_info.hint_string = enum_hint_string;
			} break;
			default:
				push_error(R"(Export type can only be built-in, a resource, a node, or an enum.)", variable);
				break;
		}
		if (is_array) {
			String hint_prefix = itos(variable->export_info.type);
			if (variable->export_info.hint) {