Fix the failing multibyte source test
Fix the failing multibyte source test

The optional source_encoding optional argument is added to
jedi.api.Script.__init__.

jonashaag/jedi,WoLpH/jedi,flurischt/jedi,dwillmer/jedi,flurischt/jedi,jonashaag/jedi,mfussenegger/jedi,tjwei/jedi,tjwei/jedi,dwillmer/jedi,mfussenegger/jedi,WoLpH/jedi