New review comment by kymnob on void-packages repository

https://github.com/void-linux/void-packages/pull/48638#discussion_r1485205731

Comment:
Would be nice to distinguish between `vkpurge list` and `vkpurge rm` under the same tag name. The doc says:

> Completion functions for commands  that  have  sub-commands  usually modify this field to contain the name of the command followed by a minus sign and the sub-command.  For example, the completion function for the `cvs` command sets this field to `cvs-add` when completing arguments to the `add` subcommand.

```suggestion
		curcontext="${curcontext%:*:*}:vkpurge-$line[1]:"
		case "$line[1]" in
```