Suggested enhancement for entering Unicode characters

[Aidan Kehoe]

 Ar an triochadú lá de mí Márta, scríobh Pete Forman>: 

 > Entering characters using quoted-insert restricts you to three octal
 > digits, according to its description.  read-quoted-char-radix allows
 > decimal or hexadecimal digits to be used instead.
 > 
 > The code number to be entered is a bit opaque to me beyond the range
 > of ASCII, or is it 8859-1.  Unicode codepoints would be more
 > meaningful.

I agree. (The range is ISO 8859-1.)

 > This patch simplisitically allows Unicode to be used.  It ought to be
 > enabled by a new custom variable to keep the current behavior OOTB.

I don’t think we should even offer that; the int-to-char number-to-character
mapping was never specified as part of the API, and varies as it is from
invocation to invocation, so anyone relying on it at the moment has broken
code. 

I’ll commit the change in the next few days unless anyone objects. 

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