where xxxx and xxxxx could be a-z, 0-9 or : (a single colon).

There could be one or more spaces after { and before the } and there could be one or more spaces between the groups in the string. Also the string could be split over two lines like





.

So it could be split at a space or after a dot. There could be one or more spaces at the end of the split line before the newline like this



where I use \ to denote a space.

My question is how do I get rid of all these strings in a file. I'm using Perl under Windows 10 if that helps.

Thanks.