Subject: "blank" character class not documented
From: Steven Penny <[email-masked]>
To: [email-masked]
Date: Tue, 06 Nov 2018 08:40:40 -0800 (PST)
List-Id: <debbugs-submit.debbugs.gnu.org>

GNU Awk support and documents the "[:blank:]" class:

http://git.savannah.gnu.org/cgit/gawk.git/tree/doc/gawk.1?id=749475a#n1963

GNU Grep supports the "[:blank:]" class as well - but is not documented:

http://git.savannah.gnu.org/cgit/grep.git/tree/doc/grep.in.1?id=30e666c#n796