Minor language tweak:
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 7050ce6e2e..08142d64cb 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3800,8 +3800,8 @@ restore_command = 'copy "C:\\server\\archivedir\\%f" "%p"' # Windows
slots</link> are allowed to retain in the <filename>pg_wal</filename>
directory at checkpoint time.
If <varname>max_slot_wal_keep_size</varname> is -1 (the default),
replication slots {+may+} retain {+an+} unlimited amount of WAL files. [-If-]{+Otherwise, if+}
restart_lsn of a replication slot [-gets-]{+falls+} behind {+by+} more than [-that megabytes-]{+the given
size+}
from the current LSN, the standby using the slot may no longer be able
to continue replication due to removal of required WAL files. You
can see the WAL availability of replication slots
