def replace$\_$string$($string$,$ char$\_$to$\_$replace, char$\_$replacement$)$:

$"""$Returns a new string where a character has been replaced

by another.

Args:

string $($str$)$: the string to replace

char$\_$to$\_$replace $($str$)$: the character to replace

replacement$\_$char $($str$)$: the character to replace with

Returns:

str: The string where the replacement was made

$"""$

how made the code manualy $($without use fonction replace$)$ with the information above?