doc: fix wording for plpgsql, add "and"

bmomjian · bmomjian · commit 41e0f89c00cd · 2018-11-26T19:41:25.000-05:00
Reported-by: Anthony Greene Discussion: https://postgr.es/m/CAPRNmnsSZ4QL75FUjcS8ND_oV+WjgyPbZ4ch2RUwmW6PWzF38w@mail.gmail.com Backpatch-through: 9.4
diff --git a/doc/src/sgml/plpgsql.sgml b/doc/src/sgml/plpgsql.sgml
@@ -4999,7 +4999,7 @@ CREATE FUNCTION
   <para>
    <application>PL/pgSQL</application> is similar to PL/SQL in many
    aspects. It is a block-structured, imperative language, and all
-   variables have to be declared.  Assignments, loops, conditionals
+   variables have to be declared.  Assignments, loops, and conditionals
    are similar.  The main differences you should keep in mind when
    porting from <application>PL/SQL</> to
    <application>PL/pgSQL</application> are:
