Subject: 26.1; Please consider adding a doc string for `extended-command-history'

From: Drew Adams <[email-masked]>
Date: Thu, 11 Apr 2019 07:22:56 -0700 (PDT)

Subject line says it all.

In GNU Emacs 26.1 (build 1, x86_64-w64-mingw32)
 of 2018-05-30
Repository revision: 07f8f9bc5a51f5aa94eb099f3e15fbe0c20ea1ea
Windowing system distributor `Microsoft Corp.', version 10.0.17134
Configured using:
 `configure --without-dbus --host=x86_64-w64-mingw32
 --without-compress-install 'CFLAGS=-O2 -static -g3''