[issue21084] IDLE can't deal with characters above the range (U+0000-U+FFFF)

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

As noted on #13153, files with astral chars can now be read without an exception, but the presence of astral chars messes up editing text that follows at least on the same line by misplacing the cursor.  I will open a new issue about replacing such with \U escapes.

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<https://bugs.python.org/issue21084>
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