zdgn - 12:01 pm on May 3, 2012 (gmt 0)
Many style guide authors know the underlying motivation from the question whether to describe the code they write—or to prescribe what code they want to write.
What does that really mean? I can be my own 'style guide author' too, you know.
I take pains to design and develop (W3C valid) stuff so that it's convenient for me to maintain while adhering to strict standards already.
I will follow my own formatting and dev guidelines and practices (again, all W3C valid), thank you!
Besides, I think some of Google's silly 'guidelines' - rule sorting or unminifieds or "meaningful" annotations - are plain self-serving to Googlebot (who I won't let snoop through my css/js anyway, regardless of what Mr Cutts demands [webmasterworld.com].)