* Refactoring whole Code class from old Html- parser to use new custom Formatter
* Cutting Code-class internal attributes on which information comes from user
* Moved Object Constructor methods to separate functions
Depricated:
* Generate_html_file argument won't fit with current formatter.
* Indentation_chars argument, is no more needed
Feature:
* Custom Formatter based on Pygments backend.
* Utility_file to Code-class testing
* Added tests
* Runtime error handling
tested:
* pygments 2.18.0

* Little linter-error fixes

* Little linter-error fixes
* More error fixes

so it can handle more hidden Tokenizer quirks automatically
* Removing newlines from end -> Those causes Paragraph class
to missbehave and enproduct had code line-number miss alignment