When updating the changelog, you should ensure that all newly created functions and classes are documented with a comment that adheres to the following format:
*Function description*
@since <version_created_in>
@author <author_name>
@param <param_type> <param_name> <param_description>
@return <type> <return_name>
For example:
/**
* Multiplies two numbers together
*
* @since 1.0.0
* @author Matt Oakley
*
* @param int $num_1 - The first number to multiple
* @param int $num_2 - The second number to multiple
*
* @return int $answer
**/
function multiple_numbers( $num_1, $num_2 ) {
$answer = $num_1 * $num_2;
return $answer;
}