- apply autopep8 + manual fixes to most of test/sql/

feature from :ticket:`1068` would not apply quoting rules to the
label name as rendered in the ORDER BY.
fix #3020, re: #1068

- move out logging tests from test_execute to test_logging

name is already an instance of _anonymous_label(), we don't downgrade
it to a plain quoted_name - fixes regression from [ticket:2812].
[ticket:2834]

instead of relying upon various ``quote=True`` flags being passed around,
these flags are converted into rich string objects with quoting information
included at the point at which they are passed to common schema constructs
like :class:`.Table`, :class:`.Column`, etc.   This solves the issue
of various methods that don't correctly honor the "quote" flag such
as :meth:`.Engine.has_table` and related methods.  The :class:`.quoted_name`
object is a string subclass that can also be used explicitly if needed;
the object will hold onto the quoting preferences passed and will
also bypass the "name normalization" performed by dialects that
standardize on uppercase symbols, such as Oracle, Firebird and DB2.
The upshot is that the "uppercase" backends can now work with force-quoted
names, such as lowercase-quoted names and new reserved words.
[ticket:2812]

:class:`.Column` object would not be propagated.  Also in 0.8.3, 0.7.11.
[ticket:2784]

- went through examples/ and cleaned out excess list() calls

that "lowercase" is the case insensitive casing, we can't distinguish between case insensitive/not
on a database that returns case-insensitive names as UPPERCASE, for names that are UPPERCASE.
[ticket:2615]