Feature command line argument f

This is just a few minor changes to the formatting. In detail, when we split up a string that is on one line in the output into two lines in the source code, we always place the space that separates words at the end of the first line, not at the beginning of the second one. There also was a small typo (defintion -> definition). Finally, I like the addition of the RawTextHelpFormatter, but I prefer the use of textwrap.dedent to the inclusion of explicit line breaks. Also, the imports should be ordered in a specific way. That can be found for example here, but basically it boils down to: First standard library, then other libraries, then our own code. from imports come after the other imports within their respective sections.