rename multiple files using your favourite $EDITOR.
massren {files}
where files is zero or more file paths.
if no files are provided, then all files in the current directory are used.
there is no special functionality for selecting files. shell globbing & piping should be used instead.
you can supply a deletion string with the -d flag. Any files renamed to this string will be deleted.
For example, use massren -d '!' *.py and change any lines to ! and they will be deleted.
An empty string can be used as a deletion string.
