Based on my understanding of the above and PyDev discussions, I see the
arguments in favor of quick inclusion as being the following:
1. This will be user invisible, so it is not a new interface feature.
2. This will prevent possible interpreter crashes or other bad behavior
as a result of malformed SREcode.  So it could be considered a bug fix.
3. Google considered this enough of a potential problem to pre-emptively
fix it.  Now that that problem has been publicly exposed, other careful
users will expect it to be fixed and will find Python more attractive
when it has been.

If this is included in the next betas, the announcement of such might
say so and encourage re users to re-run any re-based test code.