Hi,
archive_command was written twice in backup.sgml.
diff --git a/doc/src/sgml/backup.sgml b/doc/src/sgml/backup.sgml
index 8bab521718..be05a33205 100644
--- a/doc/src/sgml/backup.sgml
+++ b/doc/src/sgml/backup.sgml
@@ -956,8 +956,7 @@ SELECT * FROM pg_backup_stop(wait_for_archive => true);
Today I discovered that we already have accesskey support for navigation of
our documentation. And it's been there since at least 2007, according to
the mailing list archives.
I discovered this accidentally, because I was researching something and
just instinctively hit the right arrow in the vain