[bug#30275] [PATCH] doc: Mention escpr in CUPS configuration example.

[Diego Nicola Barbato]

This patch adds escpr to the documentation.  This was suggested here:
https://lists.gnu.org/archive/html/guix-devel/2018-01/msg00442.html

>From 87594ca621a4e5c9cabf3ff5c53425364cf90ddd Mon Sep 17 00:00:00 2001
From: Diego Nicola Barbato <address@hidden>
Date: Sun, 28 Jan 2018 20:59:02 +0100
Subject: [PATCH] doc: Mention escpr in CUPS configuration example.

Suggested by Danny Milosavljevic <address@hidden>.

* doc/guix.texi (Printing Services): Mention how to add support for
Epson printers to CUPS via escpr in the configuration example.
---
 doc/guix.texi | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/doc/guix.texi b/doc/guix.texi
index 983e00ab3..3ad947948 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -11322,16 +11322,16 @@ CUPS service will generate a self-signed certificate 
if needed, for
 secure connections to the print server.
 
 Suppose you want to enable the Web interface of CUPS and also add
-support for HP printers @i{via} the @code{hplip} package.  You can do
-that directly, like this (you need to use the @code{(gnu packages cups)}
-module):
+support for Epson printers @i{via} the @code{escpr} package and for HP
+printers @i{via} the @code{hplip} package.  You can do that directly,
+like this (you need to use the @code{(gnu packages cups)} module):
 
 @example
 (service cups-service-type
          (cups-configuration
            (web-interface? #t)
            (extensions
-             (list cups-filters hplip))))
+             (list cups-filters escpr hplip))))
 @end example
 
 The available configuration parameters follow.  Each parameter
-- 
2.16.1