surrogates in narrow builds. Fixes issue #1706460.

msilib.Record objects.

Accept unicode and anything else ParseTuple "s#" can deal with.  This
matches the time.strftime behavior.

any given threading.Thread object.  feature request issue 2871.

mention the correct type names.

new text writer.

and backrefs can't be used inside []

Closes #3011.

* Expand comments.
* Swap variable names in the sum_exact code so that x and y
  are consistently chosen as the larger and smaller magnitude
  values respectively.

Issue 2855: Fix obscure crasher by slowing down the entire module.  Mimics what was done to dictionaries in r59223.