tags 30681 notabug

On Fri, Mar 2, 2018 at 2:32 PM, Paul Eggert <egg...@cs.ucla.edu> wrote:
> On 03/02/2018 09:23 AM, Peng Yu wrote:
>> Where is this info documented for grep?
> It's not documented for grep because it's not part of grep. It's part of
> your locale.

You can check for yourself.
In every one of the 818 locales installed on a Fedora 27 system, I see
the same five bytes:

$ perl -e 'print pack ("C*", 0..255);'|grep -ao '[[:space:]]'|tr -d
'\n' |od -ac -An
  ht  vt  ff  cr  sp
  \t  \v  \f  \r

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