On 9/2/15 10:00 AM, ziyunfei wrote:
> bash-4.3$ echo $'\?'
> ?
> 
> \? should be added there.

Backslash-escape sequences that are not present in the documentation are
left unchanged.  Posix leaves these up to the implementation.

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    c...@case.edu    http://cnswww.cns.cwru.edu/~chet/

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