[libxml2] Document how to escape XML_CATALOG_FILES

[Nick Wellnhofer <nwellnhof src gnome org>]

commit fcd4c5b824cc64ceec93e2dcfd136863483839c6
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Mon Feb 7 19:22:45 2022 +0100

    Document how to escape XML_CATALOG_FILES
    
    Fixes #309.

 doc/xmlcatalog_man.xml | 4 ++--
 doc/xmllint.xml        | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/doc/xmlcatalog_man.xml b/doc/xmlcatalog_man.xml
index 1e0ba5c8..ec9b190c 100644
--- a/doc/xmlcatalog_man.xml
+++ b/doc/xmlcatalog_man.xml
@@ -368,8 +368,8 @@
                <para><acronym>XML</acronym> catalog behavior can be changed by redirecting
                        queries to the user's own set of catalogs. This can be done by setting
                        the <envar>XML_CATALOG_FILES</envar> environment variable to a space-separated
-                       list of catalogs. An empty one should deactivate loading the
-                       default <filename>/etc/xml/catalog</filename> catalog.
+                       list of catalogs. Use percent-encoding to escape spaces or other characters.
+                       An empty variable should deactivate loading the default 
<filename>/etc/xml/catalog</filename> catalog.
                </para>
        </listitem>
                </varlistentry>
diff --git a/doc/xmllint.xml b/doc/xmllint.xml
index 59a6c727..7d83827c 100644
--- a/doc/xmllint.xml
+++ b/doc/xmllint.xml
@@ -786,8 +786,8 @@
                <para><acronym>XML</acronym> catalog behavior can be changed by redirecting
                        queries to the user's own set of catalogs. This can be done by setting
                        the <envar>XML_CATALOG_FILES</envar> environment variable to a space-separated
-                       list of catalogs. An empty one should deactivate loading the
-                       default <filename>/etc/xml/catalog</filename> catalog.
+                       list of catalogs. Use percent-encoding to escape spaces or other characters.
+                       An empty variable should deactivate loading the default 
<filename>/etc/xml/catalog</filename> catalog.
                </para>
        </listitem>
                </varlistentry>