Fix auto-quoting via ',' as the first character, which had broken in refactor.

IPython/core/prefilter.py

@@ -158,7 +158,7 b' class LineInfo(object):'
         without worrying about *further* damaging state.
         """
         if not self._oinfo:
-            self._oinfo = ip._ofind(self.ifun)
+            self._oinfo = ip.shell._ofind(self.ifun)
         return self._oinfo
 
     def __str__(self):