### Godot version

4.0 beta 10

### System information

Windows 11

### Issue description

On the text editor when using autocomplete on function arguments that receive Input Map names after autocompleting the function name, the string autocompleted appears with an extra " at the end.
This doesnt happen if you write " and then accept the Input name in the dropdown

### Steps to reproduce

- On the script editor
- Start writing `Input.get_vector` but when the dropdown appears with the autocomplete suggestion for `Input.get_vector` press enter to accept it, then press enter again to accept the Input map suggestion
- The autocompleted input name should have an extra "

### Minimal reproduction project

N/A
CHECK(completion_prefixes.size() == 2);
		CHECK(completion_prefixes.has("."));
		CHECK(completion_prefixes.has(","));
		code_edit->set_text("test\ntest");
		CHECK(code_edit->get_text_for_code_completion() == String::chr(0xFFFF) + "test\ntest");
	}
	SUBCASE("[CodeEdit] autocomplete request") {
		SIGNAL_WATCH(code_edit, "code_completion_requested");
		code_edit->set_code_completion_enabled(true);
		Array signal_args;
		signal_args.push_back(Array());
		
		code_edit->request_code_completion();
		SIGNAL_CHECK_FALSE("code_completion_requested");
		code_edit->request_code_completion(true);
		SIGNAL_CHECK("code_completion_requested", signal_args);
		
		SEND_GUI_ACTION(code_edit, "ui_text_completion_query");
		SIGNAL_CHECK("code_completion_requested", signal_args);
		
		TypedArray<String> completion_prefixes;
		completion_prefixes.push_back(".");
		code_edit->set_code_completion_prefixes(completion_prefixes);
		code_edit->insert_text_at_caret(".");
		code_edit->request_code_completion();
		SIGNAL_CHECK("code_completion_requested", signal_args);
		
		code_edit->insert_text_at_caret(" ");
		code_edit->request_code_completion();
		SIGNAL_CHECK("code_completion_requested", signal_args);