Some additional unit tests for source formatter

[wiiitek]

Just a proposition: I added few tests for ALLFORMATTED mode for source comparator

Description

Only few tests to see if code is properly formatted.
By the way: JSoup parser always wraps the code with ... ... :)

Motivation and Context

We didn't have tests for this mode before.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project.
• I have reviewed (and updated if needed) the documentation regarding this change

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I hereby agree to the terms of the AET Contributor License Agreement.

[malaskowski]

Thank you @wiiitek for additional unit tests.