Very strange error of indentation

[samsonite]

Hi Verb Conjugator!
If you get a glance to the source (uploaded into the opening post) http://reionization.org/wp-content/uploa...st2ra.html you may note that the mismatch is created by in [4] piece of code, undoubtely coming from Mathematica editor.
So, for future applications I'll be careful to take Python codes from such sources, which could conflict with my preferred editor (geany).
Thank you, and cheers