Commits on Jan 22, 2020

1. Fix compatibility with Jython …

   This patch was taken from
   #369 (comment),
   authored by Pekka Klärck <peke@iki.fi>.
   
   In short, Jython doesn't support lone surrogates, so importing yaml (and
   in particular, loading `reader.py`) caused a UnicodeDecodeError. This
   patch works around this through a clever use of `eval` to defer
   evaluation of the string containing the lone surrogates, only doing it
   on non-Jython platforms.
   
   This is only done in `lib/yaml/reader.py` and not `lib3/yaml/reader.py`
   because Jython does not support Python 3.
   
   With this patch, Jython's behavior with respect to Unicode code points
   over 0xFFFF becomes as it was before
   0716ae2. It still does not pass all the
   unit tests on Jython (passes 1275, fails 3, errors on 1); all the
   failing tests are related to unicode. Still, this is better than simply
   crashing upon `import yaml`.
   
   With this patch, all tests continue to pass on Python 2 / Python 3.

   

   anishathalye committed Jan 22, 2020
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