plumbum.cli.Flag shouldn't print the default on execution of --help
plumbum.cli.Flag shouldn't print the default on execution of --help

https://github.com/tomerfiliba/plumbum/issues/183

AndydeCleyre/plumbum,siemens/plumbum,adamchainz/plumbum,vodik/plumbum,tigrawap/plumbum,astraw38/plumbum,AndydeCleyre/plumbum,tomerfiliba/plumbum,weka-io/plumbum,vodik/plumbum,tomerfiliba/plumbum,weka-io/plumbum,pombredanne/plumbum,fahhem/plumbum,fahhem/plumbum,henryiii/plumbum,siemens/plumbum,tigrawap/plumbum,adamchainz/plumbum,pombredanne/plumbum,astraw38/plumbum,henryiii/plumbum