`conda kapsel` command doesn't work with space for conda > 4.1

[koverholt]

With conda 4.1, I can run the conda kapsel or conda-kapsel commands:

$ conda --version
conda 4.1.12

$ conda kapsel
Must specify a subcommand.
usage: conda-kapsel [-h] [-v] [--verbose]
                    {init,run,prepare,clean,archive,unarchive,upload,add-variable,remove-variable,list-variables,set-variable,unset-variable,add-download,remove-download,list-downloads,add-service,remove-service,list-services,add-env-spec,remove-env-spec,list-env-specs,add-packages,remove-packages,list-packages,add-command,remove-command,list-commands}

With conda 4.2 or greater, I can no longer run conda kapsel (with a space in the command):

$ conda --version
conda 4.3.8

$ conda kapsel
usage: conda [-h] [-V] command ...
conda: error: argument command: invalid choice: '/Users/koverholt/anaconda3/envs/ap/bin/conda' (choose from 'info', 'help', 'list', 'search', 'create', 'install', 'update', 'upgrade', 'remove', 'uninstall', 'config', 'clean', 'package')