[libstdc++-,doc] Mislocated </variablelist>

[Przemyslaw Wirkus]

Hello,

Wrong </variablelist> element position causes libstdc++v3 make doc-pdf-docbook
docs generation procedure to fail.

PDF documentation generation for libstdc++v3 is broken for make doc-pdf-docbook
rule. Pdflatex compilation fail because Latex is not correctly generated from
wrongly formatted variablelist elements in XML docs: one varlist entry is
outside section of variablelist elements:

<variablelist>
  <varlistentry/>
  <varlistentry/>
  <varlistentry/>
</variablelist>
  <varlistentry/>

Commit that caused the regression is:

  Author: redi
  Date: Fri Jul 21 16:05:10 2017
  New Revision: 250430
  URL: https://gcc.gnu.org/viewcvs?rev=250430&root=gcc&view=rev

Tested by regenerating libstdc++v3 docs with 'make doc-pdf-docbook'.

OK for trunk?

Kind regards,
Przemyslaw Wirkus

libstdc++-v3/ChangeLog:

2017-11-08  Przemyslaw Wirkus  <przemyslaw.wirkus@arm.com>

	* doc/xml/manual/using.xml (manual.intro.using.macros): Move
	variablelist element at the end of its list.
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