doc: improve wording of plpgsql RAISE format text

bmomjian · bmomjian · commit f1e3a7075832 · 2022-06-22T16:59:54.000-04:00
Reported-by: pg@kirasoft.com Discussion: https://postgr.es/m/165455351426.573551.7050474465030525109@wrigleys.postgresql.org Backpatch-through: 10
diff --git a/doc/src/sgml/plpgsql.sgml b/doc/src/sgml/plpgsql.sgml
@@ -3767,7 +3767,7 @@ RAISE ;
 
    <para>
     After <replaceable class="parameter">level</replaceable> if any,
-    you can write a <replaceable class="parameter">format</replaceable>
+    you can specify a <replaceable class="parameter">format</replaceable> string
     (which must be a simple string literal, not an expression).  The
     format string specifies the error message text to be reported.
     The format string can be followed
