### 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
ERR_FAIL_COND_V_MSG(p_node->type != Node::FUNCTION, false, vformat(R"("%s" annotation can only be applied to functions.)", p_annotation->name));
	FunctionNode *function = static_cast<FunctionNode *>(p_node);
	if (function->rpc_config.get_type() != Variant::NIL) {
		push_error(R"(RPC annotations can only be used once per function.)", p_annotation);
		return false;
	}
	Dictionary rpc_config;
	rpc_config["rpc_mode"] = MultiplayerAPI::RPC_MODE_AUTHORITY;
	if (!p_annotation->resolved_arguments.is_empty()) {
		int last = p_annotation->resolved_arguments.size() - 1;
		if (p_annotation->resolved_arguments[last].get_type() == Variant::INT) {
			rpc_config["channel"] = p_annotation->resolved_arguments[last].operator int();
			last -= 1;
		}
		if (last > 3) {
			push_error(R"(Invalid RPC arguments. At most 4 arguments are allowed, where only the last argument can be an integer to specify the channel.')", p_annotation);
			return false;
		}
		unsigned char locality_args = 0;
		unsigned char permission_args = 0;
		unsigned char transfer_mode_args = 0;
		for (int i = last; i >= 0; i--) {
			String arg = p_annotation->resolved_arguments[i].operator String();
			if (arg == "call_local") {
				locality_args++;
				rpc_config["call_local"] = true;
			} else if (arg == "call_remote") {
				locality_args++;
				rpc_config["call_local"] = false;
			} else if (arg == "any_peer") {