- A user reported the following error when running `brew gist-logs`,
reproducible with any formula:

```
$ brew gist-logs rustup-init
Error: undefined method `length' for nil:NilClass
Please report this bug:
  https://docs.brew.sh/Troubleshooting
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/cmd/gist-logs.rb:145:in `gist_logs'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/brew.rb:102:in
```

- From what I can tell, `gist_logs_args.parse` had ended up in the wrong
  method. The `gistify_logs` method already has `formula` (ie the
  formula name) passed into it. But it's the `gist_logs` method that needs
  to do the argument parsing. This was discovered by looking at some other
  recently changed ARGV => Homebrew.args code like cmd/info.