Add small detail to RAISE statement descripton

[Igor Gnatyuk]

Hi,

There is a slight syntax inaccuracy in the description of the RAISE
statement - assignments of parameter values in USING.
(Chapter 43. PL/pgSQL — SQL Procedural Language / 43.9 Errors and
Messages / 43.9.1 Reporting Errors and Messages):

"...You can attach additional information to the error report by
writing USING followed by option = expression items..."
It should, apparently, be like this: "...option { = | := } expression..."

The patch corrects this little omission. Attached: fix_doc_raise.patch

Regards, Igor Gnatyuk

diff --git a/doc/src/sgml/plpgsql.sgml b/doc/src/sgml/plpgsql.sgml
index 6f880b705f..97bbf5244c 100644
*** a/doc/src/sgml/plpgsql.sgml
--- b/doc/src/sgml/plpgsql.sgml
***************
*** 3805,3814 **** CALL transaction_test2();
      raise errors.
  
  <synopsis>
! RAISE <optional> <replaceable class="parameter">level</replaceable> </optional> '<replaceable class="parameter">format</replaceable>' <optional>, <replaceable class="parameter">expression</replaceable> <optional>, ... </optional></optional> <optional> USING <replaceable class="parameter">option</replaceable> = <replaceable class="parameter">expression</replaceable> <optional>, ... </optional> </optional>;
! RAISE <optional> <replaceable class="parameter">level</replaceable> </optional> <replaceable class="parameter">condition_name</replaceable> <optional> USING <replaceable class="parameter">option</replaceable> = <replaceable class="parameter">expression</replaceable> <optional>, ... </optional> </optional>;
! RAISE <optional> <replaceable class="parameter">level</replaceable> </optional> SQLSTATE '<replaceable class="parameter">sqlstate</replaceable>' <optional> USING <replaceable class="parameter">option</replaceable> = <replaceable class="parameter">expression</replaceable> <optional>, ... </optional> </optional>;
! RAISE <optional> <replaceable class="parameter">level</replaceable> </optional> USING <replaceable class="parameter">option</replaceable> = <replaceable class="parameter">expression</replaceable> <optional>, ... </optional>;
  RAISE ;
  </synopsis>
  
--- 3805,3814 ----
      raise errors.
  
  <synopsis>
! RAISE <optional> <replaceable class="parameter">level</replaceable> </optional> '<replaceable class="parameter">format</replaceable>' <optional>, <replaceable class="parameter">expression</replaceable> <optional>, ... </optional></optional> <optional> USING <replaceable class="parameter">option</replaceable> { = | := } <replaceable class="parameter">expression</replaceable> <optional>, ... </optional> </optional>;
! RAISE <optional> <replaceable class="parameter">level</replaceable> </optional> <replaceable class="parameter">condition_name</replaceable> <optional> USING <replaceable class="parameter">option</replaceable> { = | := } <replaceable class="parameter">expression</replaceable> <optional>, ... </optional> </optional>;
! RAISE <optional> <replaceable class="parameter">level</replaceable> </optional> SQLSTATE '<replaceable class="parameter">sqlstate</replaceable>' <optional> USING <replaceable class="parameter">option</replaceable> { = | := } <replaceable class="parameter">expression</replaceable> <optional>, ... </optional> </optional>;
! RAISE <optional> <replaceable class="parameter">level</replaceable> </optional> USING <replaceable class="parameter">option</replaceable> { = | := } <replaceable class="parameter">expression</replaceable> <optional>, ... </optional>;
  RAISE ;
  </synopsis>
  
***************
*** 3855,3861 **** RAISE NOTICE 'Calling cs_create_job(%)', v_job_id;
     <para>
      You can attach additional information to the error report by writing
      <literal>USING</literal> followed by <replaceable
!     class="parameter">option</replaceable> = <replaceable
      class="parameter">expression</replaceable> items.  Each
      <replaceable class="parameter">expression</replaceable> can be any
      string-valued expression.  The allowed <replaceable
--- 3855,3861 ----
     <para>
      You can attach additional information to the error report by writing
      <literal>USING</literal> followed by <replaceable
!     class="parameter">option</replaceable> { = | := } <replaceable
      class="parameter">expression</replaceable> items.  Each
      <replaceable class="parameter">expression</replaceable> can be any
      string-valued expression.  The allowed <replaceable