Maybe move `argv` function to parent `module SpecHelper` to avoid duplication, as this is the same for `PluginCreateCommand` and `PluginSearchCommand` right now?

Or even integrate the call to `CLAide::ARGV.new(args)` directly in the `create_command`+`search_command` functions, so that we use `create_command('my gem')` instead of having to write `create_command(argv('my gem'))`?