If a file has a return on the last line of text followed by the file end assertion, it will not remove that extra return if you are searching for empty lines. This regex does the trick:
^!Replace “\R(?=\R)|\A\R|\R\z” >> “” AWRS
Note per Sheri: \z is an assertion for the position of end of the file. It has a width of zero characters. Ditto for \A, \Z, \z, ^ and $.
This clip makes a file into a comma separated value file if it is say tab delimited at the start. It offers several choices of delimiters to start including comma, semi-colon, colon, tabs, etc.