[$] Applying PEP 8

Two recent threads on the python-ideas mailing list have overlapped to acertain extent; both referred to Python's style guide, but the discussionindicates that the advice in it may have been stretched further than intended. PEP 8("Style Guide for Python Code") is the longstanding set ofguidelines and suggestions for code that is going into the standardlibrary, but the "rules" in the PEP have been applied in settings and tools well outside of thatrealm. There may be reasons to update the PEP-some unrelated work of that nature isongoing, in fact-but Pythonistas need to remember that the suggestions init are not carved in stone.