Applied on top of a pure run of black -l 79 in
I7eda77fed3d8e73df84b3651fd6cfcfe858d4dc9,  this set of changes
resolves all remaining flake8 conditions for those codes
we have enabled in setup.cfg.

Included are resolutions for all remaining flake8 issues
including shadowed builtins, long lines, import order, unused
imports, duplicate imports, and docstring issues.

Change-Id: I4f72d3ba1380dd601610ff80b8fb06a2aff8b0fe

This is a straight reformat run using black as is, with no edits
applied at all.

The black run will format code consistently, however in
some cases that are prevalent in SQLAlchemy code it produces
too-long lines.   The too-long lines will be resolved in the
following commit that will resolve all remaining flake8 issues
including shadowed builtins, long lines, import order, unused
imports, duplicate imports, and docstring issues.

Change-Id: I7eda77fed3d8e73df84b3651fd6cfcfe858d4dc9

Change-Id: I57144a559f20abab02e745d052be5ff84edec7f8
(cherry picked from commit c89729cf67f441359da8289104050b01eb53160b)

Since I didn't even realize what this was for when reading the docs,
make it clearer that this is to mirror a Column default and remove
the extra verbiage about the mechanics of INSERTs.

Change-Id: Id2c6a29800f7b723573610e4707aec7e6ea38f5f
(cherry picked from commit 71b01adc7b31baab7bbcf40123633b87ee53bf64)

This allows us to build default-setting recipes such
as one that allows us to actively read column-level
defaults.  An example suite is also added.

Change-Id: I7b022d52cc89526132d5bc4201ac27fea4cf088d
Fixes: #1311

to allow ad-hoc display of the source of any file, as well as a "directory listing" structure.
- reorganize examples/ to take advantage of new extension.  in particular, keep moving all
the descriptive text for files etc. into module docstrings, taking more advantage of
self-documentation.

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