Original patch by Berker Peksag.

OverflowError when an argument of %c format is out of range.

for symlinks.

and in ssl.SSLContext.load_cert_chain() for strings and passwords longer
than 2 gigabytes.

complex.__format__().

'Find in files' by replacing 'open with implicit close' by 'with open' in
GrepDialog method grep_it. Streamline code with enumerate(), direct file
iteration, and output tweak. Add test for this method, including output format.

Problem noted & original patch by Serhiy Storchaka; I tweaked the patch a bit.

http://www.freebsd.org/doc/en/books/arch-handbook/driverbasics-block.html

* state that python3 source encoding is UTF-8, and give examples

* mention surrogateescape in the 'tips and tricks' section, and
  backslashreplace in the "Python's Unicode Support" section.

* Describe Unicode support provided by the re module.

* link to Nick Coghlan's and Ned Batchelder's notes/presentations.

* default filesystem encoding is now UTF-8, not ascii.

* Describe StreamRecoder class.

* update acks section

* remove usage of "I think", "I'm not going to", etc.

* various edits

* remove revision history and original outline

Patch contributed by Corey Brune.

The exception is the import related questions at the end, which
need to be rewritten anyway.

ISO C90 forbids mixed declarations and code

faulthandler._read_null() is not reliable: it does not crash on AIX.

sigwaitinfo() can be interrupted on Linux (raises InterruptedError), but not on
AIX.