[Python-Dev] Emit SyntaxWarning on unrecognized backslash escapes?

[Serhiy Storchaka]

On 24.02.15 00:50, Nick Coghlan wrote:
>> - SyntaxError in Python 3.7

I think that SyntaxError could wait to 4.0.

> Another suggestion: we may want to turn this particular deprecation
> warning on by default in the interactive interpreter, and recommend
> that other interactive interpreter developers (such as the IPython
> folks) consider doing the same.

Why not turn all deprecation warning on by default in the interactive 
interpreter?