Fix in 13.Code_Convention.pdf

[Leonardo Fraccaroli]

Hi Federico,
on page 34, the second example
# if define(MACRO1) && defined(MACRO2)
should be change to
# if defined(MACRO1) && defined(MACRO2)

Moreover, on page 60 the first bullet point contains "whatever" in the sentence, but I believe it should be "whenever" instead.

[Federico]

Hi @leofracca, thanks again. Both hard to catch.