There are misprints in postgres doc., in :

Chapter 10. PL/pgSQL - SQL Procedural Language (c40914117.htm)

Statements
...
(resulting in a PL/pgSQL internal SELECT).
But there are cases where someone isn't interested int
-----------------------------------------(have to be)-->
But there are cases where someone isn't interested in
     the functions result.

 RAISE level format''
--(have to be)-->
 RAISE level 'format'

doc/src/sgml/plsql.sgml

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  <chapter id="plsql">
@@ -472,7 +472,7 @@ END IF;
 	database return a value. Thus, the normal way to call a function
 	is to execute a SELECT query or doing an assignment (resulting
 	in a PL/pgSQL internal SELECT). But there are cases where someone
-	isn't interested int the functions result.
+	isn't interested in the functions result.
 	<programlisting>
 PERFORM <replaceable>query</replaceable>
 	</programlisting>
@@ -564,7 +564,7 @@ RETURN <replaceable>expression</replaceable>
 	can throw messages into the <productname>Postgres</productname>
 	elog mechanism.
 	<programlisting>
-RAISE <replaceable class="parameter">level</replaceable> <replaceable class="parameter">format</replaceable>'' [, <replaceable class="parameter">identifier</replaceable> [...]];
+RAISE <replaceable class="parameter">level</replaceable> '<replaceable class="parameter">format</replaceable>' [, <replaceable class="parameter">identifier</replaceable> [...]];
 	</programlisting>
 	Inside the format, "<literal>%</literal>" is used as a placeholder for the
 	subsequent comma-separated identifiers. Possible levels are