### 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
code_edit->set_text("");
	code_edit->insert_text_at_caret("line 1\nline 2\nline 3");
	code_edit->select_all();
	code_edit->backspace();
	CHECK(code_edit->get_text().is_empty());
	
	code_edit->set_text("");
	code_edit->insert_text_at_caret("line 1\nline 2\nline 3");
	code_edit->set_caret_line(0);
	code_edit->set_caret_column(0);
	code_edit->backspace();
	CHECK(code_edit->get_text() == "line 1\nline 2\nline 3");
	memdelete(code_edit);
}
TEST_CASE("[SceneTree][CodeEdit] New Line") {
	CodeEdit *code_edit = memnew(CodeEdit);
	SceneTree::get_singleton()->get_root()->add_child(code_edit);
	code_edit->grab_focus();
	
	code_edit->set_text("");
	code_edit->insert_text_at_caret("test new line");
	code_edit->set_caret_line(0);
	code_edit->set_caret_column(13);
	SEND_GUI_ACTION(code_edit, "ui_text_newline");
	CHECK(code_edit->get_line(0) == "test new line");
	CHECK(code_edit->get_line(1) == "");
	
	code_edit->set_text("");
	code_edit->insert_text_at_caret("test new line");
	code_edit->set_caret_line(0);