[Python-3000] Support for PEP 3131

[Stephen J. Turnbull]

Ka-Ping Yee writes:

 > Would the display of source code be affected this way as well?

Of course!  That's what PEP 3131 proponents *want*.  From the draft
you cite: "certain phenomena in this relationship may look strange to
somebody not familiar with bidirectional behavior, but familiar to
users of Arabic and Hebrew."  Ie, we proponents want to allow programs
that look familiar to native speakers of various languages, but do not
look familiar to monolingual speakers of American English.