change "\\n+" into "\\n" in z regexpflag {"EXTENDED"} with regexp

On 07/06/2006, at 7:10 PM, Joe Barwell wrote:
> I've been wrestling with a very basic regex problem, using Satimage
> osax, os 10.3.9. Basically, I want to strip multiple blank lines
> (i.e. carriage-returns), but leave the remaining text and single
> carriage-returns, e.g. the data may look like this: