renamed BytesIO to StringIO, because it no longer made sense

jedi/parsing.py

@@ -28,7 +28,7 @@ All those classes are being generated by PyFuzzyParser, which takes python text
 as input and ignores just all the non-python stuff. Basically you could feed it
 a perl script, and it should still work (which means throw no error.
 """
-from _compatibility import (next, literal_eval, tokenize_func, BytesIO,
+from _compatibility import (next, literal_eval, tokenize_func, StringIO,
                             property, is_py3k, cleandoc, Python3Method)
 
 import tokenize
@@ -1592,7 +1592,7 @@ class PyFuzzyParser(object):
 
         :raises: IndentationError
         """
-        self.buf = BytesIO(self.code)
+        self.buf = StringIO(self.code)
         self.gen = PushBackIterator(tokenize_func(self.buf.readline))
 
         extended_flow = ['else', 'elif', 'except', 'finally']