Windows: Unicode Character is not escaped

[matthewshirley]

I've noted when using a windows machine, a Unicode character is added to every value.

'OS': 'Windows_NT',
'EXAMPLE_KEY': u'EXAMPLE_VALUE'

This is using the example listed in the README.

[greyli]

Same issue with Python 2.7 on Windows. I have this value in .env:

FLASK_ENV=development

After loaded, it change to:

u'FLASK_ENV'=development

Then it cause a TypeError: environment can only contain strings. Any help?

[theskumar]

@matthewshirley @greyli would you be able to provide the exact steps, so i can reproduce it. A patch is also welcomed.

[greyli]

I'll try to make a PR.