Minor markup fixes.

Author: Thomas G. Lockhart

doc/src/sgml/install.sgml

@@ -30,7 +30,8 @@
     </ListItem>
     <ListItem>
      <Para>
-      User <literal>postgres</literal> is the <ProductName>Postgres</ProductName> superuser.
+      User <literal>postgres</literal> is the 
+      <ProductName>Postgres</ProductName> superuser.
      </Para>
     </ListItem>
     <ListItem>

doc/src/sgml/rules.sgml

@@ -1671,7 +1671,8 @@
 
     UPDATE shoelace_data SET
            sl_avail = shoelace_data.sl_avail + shoelace_arrive.arr_quant
-     FROM shoelace_arrive shoelace_arrive, shoelace_data shoelace_data,
+     FROM shoelace_arrive shoelace_arrive,
+          shoelace_data shoelace_data,
           shoelace_data s
     WHERE s.sl_name = shoelace_arrive.sl_name
       AND shoelace_data.sl_name = s.sl_name;