Django 2.2b1 throws error on Windows in default code page

[Dan Davis]

By default, Windows terminals start with code page 437, which is roughly equivalent to ASCII. While working on #30178, I discovered that this causes the following traceback:

`
(mplusmon) λ manage.py runserver
Watchman unavailable: pywatchman not installed.
Watching for file changes with StatReloader
Exception in thread Thread-1:
Traceback (most recent call last):

File "c:\tools\python\3.5\Lib\threading.py", line 914, in _bootstrap_inner

self.run()

File "c:\tools\python\3.5\Lib\threading.py", line 862, in run

self._target(*self._args, self._kwargs)

File "C:\Users\davisda4\PythonEnvs\mplusmon\lib\site-packages\django\utils\autoreload.py", line 54, in wrapper

fn(*args, kwargs)

File "C:\Users\davisda4\PythonEnvs\mplusmon\lib\site-packages\django\core\management\commands\runserver.py", line 116, in inner_run

self.stdout.write("Performing system checks\u2026\n\n")

File "C:\Users\davisda4\PythonEnvs\mplusmon\lib\site-packages\django\core\management\base.py", line 145, in write

self._out.write(style_func(msg))

File "C:\Users\davisda4\PythonEnvs\mplusmon\lib\encodings\cp437.py", line 19, in encode

return codecs.charmap_encode(input,self.errors,encoding_map)[0]

UnicodeEncodeError: 'charmap' codec can't encode character '\u2026' in position 24: character maps to <undefined>
`

The problem can be resolved by changing the code page to UTF-8, as follows:

`
chcp 65001
`

This appears to be a new issue relative to Django 2.1.7, because the problem did not occur there. I'll track down wherever someone entered the horizontal elipsis character rather than "..." into the code, because this ought to be easy enough to fix.