Dear intern, if you really really have the urge to use fucking spaces for indentation because it let's you feel like being some Google hipster, then PLEASE AT LEAST REMOVE THE SPARE ONES WHEN YOU FUCKING COPY PASTE CODEBLOCKS!!!1!!1111!

I'm perfectly OK if people wanna use spaces if they use it in an OCD-proof manner.

Nah, let's be honest: Spaces are a filthy way to indent stuff. Tabs are in a lot ways superior and if an editor can't render tabs correctly, the editor is a piece of worm puke.

The UML specification book satisfies OCD quite well I'd say.

Page 59, the actual content hasn't started yet, but I'm happy: "Within each clause, there is first a brief informal description of the concepts described in that clause. The clause is then
split into sub clauses, each describing a coherent set of concepts that constitute a portion of the formalism specified by
the clause. Each sub clause is then split into Abstract Syntax, Semantics, Notation, and Examples.
"