Message 367698 - Python tracker

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Content 
The original issue was about different error messages in REPL and eval(). But it is not related to string prefixes. We have the same difference without involving strings:

>>> a b
  File "<stdin>", line 1
    a b
      ^
SyntaxError: invalid syntax
>>> eval("a b")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<string>", line 1
    a b
      ^
SyntaxError: unexpected EOF while parsing

I suggest to revert this change and close the issue.