Fix minor issues like typos and code style violations.

[vamega]

Description

• Fixes some of the code style to align with PEP-8 (respecting this projects overrides of PEP-8"

Bugs and Issues

• Fixes change the descriptoin of profiles #54`

How Has This Been Tested?

• None
  If there is a good way to test these changes I'd like to hear that.

As an example:

Test Configuration:

• Hardware: VirtualBox 6.1
• Specific steps: Ran installer with additional packages nano and wget

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code to the best of my abilities
• I have commented my code, particularly in hard-to-understand areas (N/A)
• I have made corresponding changes to the documentation where possible/if applicable (N/A))

[Torxed]

I'll document the testing a bit better!

But in short, it's essentially just booting any ArchISO with python on it (should be default now days) and wget the zip of this branch (git works too, but it's not default on the ISO), unpacking it and running cp examples/guided.py ./ && python guided.py on the ISO in a VM :) I've got an automated build for it, but it currently only works on master. So there's still a lot of manual work on branches/PR's/bug-reports hehe.

This PR passes a default installation with all options enabled:

{
    "harddrive": {
    	"path": "/dev/sda",
    	"size": "5G",
        "encryption": true
    },
    "hostname": "testmachine",
    "mirrors" : {
    	"Sweden" : {
    		"https://archlinux.dynamict.se/$repo/os/$arch": true,
    		"https://ftp.lysator.liu.se/pub/archlinux/$repo/os/$arch": true
    	}
    },
    "packages": [
    	"nano"
    ],
    "profile": {
    	"path": "awesome"
    },
    "users": [
    	"anton"
    ]
}

(This is just an early mock-up of the declarative profiles that will be implemented, which should help support/community contributors to understand what a profile does.. for auditing purposes)