[issue1720390] Remove backslash escapes from tokenize.c.

[Guido van Rossum]

Guido van Rossum added the comment:

FWIW, I'm +1 on the part of this patch that disables \u in raw strings.
I just had a problem with a doctest that couldn't be run in verbose mode
because \u was being interpreted in raw mode...  But I'm still solidly
-1 on allowing trailing \.

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