Ingest with shell expanded list of files throws "Error: accepts at most 1 arg(s), received x"

The example of the `ingest` command says:

```
# Ingest the contents of all files inside /var/logs/nginx with
# extension ".log" into a dataset named "nginx-logs":
$ axiom ingest nginx-logs -f /var/logs/nginx/*.log
```

But it actually throws `Error: accepts at most 1 arg(s), received x`, with x being the amount of actual files the shell expanded to.