the input that does not
                    match the expression. If the expression does contain marked sub-expressions,
                    then outputs one string for each marked sub-expression each time
                    a match occurs. Outputs no more than <span class="emphasis"><em>max_count</em></span>
                    strings. Before returning, deletes from the input string <span class="emphasis"><em>s</em></span>
                    all of the input that has been processed (all of the string if