* doc/xml/faq.xml (faq.stream_reopening_fails): Replace <quote> in
	code example.
	* doc/xml/manual/backwards_compatibility.xml
	(backwards.second.stringstreams): Likewise.
	* doc/xml/manual/configure.xml (--enable-libstdcxx-time): Document
	change of default.
	* doc/xml/manual/containers.xml (associative.bitset.type_string):
	Replace <quote> in code example.
	* doc/xml/manual/debug.xml: Clarify reference to ThreadSanitizer.
	* doc/xml/manual/documentation_hacking.xml: Improve debugging tips,
	fix typos, improve markup.
	* doc/xml/manual/intro.xml (manual.intro.status.bugs.iso): Replace
	<emphasis> with <replaceable>.
	* doc/xml/manual/locale.xml (locale.impl.c): Remove backticks.
	* doc/xml/manual/support.xml (std.support.memory): Replace <quote>
	and remove newlines in string literal.

From-SVN: r211316