### Godot version

4.0.2.stable

### System information

window10,forward+

### Issue description

![](https://i.postimg.cc/sXJvX6YG/4-7-2023-2-31-56-PM.jpg)

> extends "../DmUtils/tween_panel.gd"
> 
> """gd"""
> func _ready() -> void:
> ____"super"   # Suggestions willl extra quote added!

### Steps to reproduce

1. foo BASE.gd
2. another subclass extends it (extends "../folder/BASE.gd")
3. type subclass callback say: _ready(): TYPE super THEN "super" appeared

### Minimal reproduction project

none
ERR_FAIL_INDEX_MSG(caret_column, line.length() + 1, "Caret column exceeds line length.");
	if (caret_column > 0 && line[caret_column - 1] == '(' && !code_completion_forced) {
		cancel_code_completion();
		return;
	}
	
	int in_string = is_in_string(caret_line, caret_column);
	int first_quote_col = -1;
	if (in_string != -1) {
		Point2 string_start_pos = get_delimiter_start_position(caret_line, caret_column);
		first_quote_col = (string_start_pos.y == caret_line) ? string_start_pos.x : -1;
	} else if (caret_column > 0) {
		if (is_in_string(caret_line, caret_column - 1) != -1) {
			first_quote_col = caret_column - 1;
		}
	}
	int cofs = caret_column;
	String string_to_complete;
	bool prev_is_word = false;
	
	if (caret_column > 0 && in_string == -1 && first_quote_col == cofs - 1) {
		cancel_code_completion();
		return;
		
	} else if (in_string != -1 && first_quote_col != -1) {
		int key_length = delimiters[in_string].start_key.length();
		string_to_complete = line.substr(first_quote_col - key_length, (cofs - first_quote_col) + key_length);
		
	} else if (cofs > 0 && line[cofs - 1] == ' ') {
		int ofs = cofs - 1;