Use uniform spacing and tabulation/indentation style throughout the code

[Eyal Rozenberg]

Different parts of the code - even different lines within the same function - use different conventions for indentation/tabulation and intra-line spacing, including space vs tabs. Let's make that all uniform.

[Eyal Rozenberg]

Closing this on second thought, as this will introduce diff results against the original code on, well, most lines, everywhere. Let's just leave spacing as it is.