I know that when substituting in perl
s/a.b/foo/g
will (i think) change all occurences of 'asb', 'avb', 'ahb', 'a[any character]b' with 'foo'.
how can I get it so that it will replace, more than a single character, so that as well as replacing 'asb'. 'ahb' etc, it will also replace 'awwwwwb', 'acccccccccccb', aertyub' etc.
Please ask if this makes no sense!