[gcc r10-8917] libstdc++: Fix misnamed configure option in manual

[Jonathan Wakely]

https://gcc.gnu.org/g:88462e62a64e056dee428f171ebb825d287d5a97

commit r10-8917-g88462e62a64e056dee428f171ebb825d287d5a97
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Thu Sep 24 17:33:16 2020 +0100

    libstdc++: Fix misnamed configure option in manual
    
    libstdc++-v3/ChangeLog:
    
            * doc/xml/manual/configure.xml: Correct name of option.
            * doc/html/*: Regenerate.
    
    (cherry picked from commit 61f7995398a719f2ff91d07e8f8ed6d4413db697)

Diff:
---
 libstdc++-v3/doc/html/manual/configure.html | 3 ++-
 libstdc++-v3/doc/xml/manual/configure.xml   | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/libstdc++-v3/doc/html/manual/configure.html b/libstdc++-v3/doc/html/manual/configure.html
index 0d97beaf7b4..7ca9efce747 100644
--- a/libstdc++-v3/doc/html/manual/configure.html
+++ b/libstdc++-v3/doc/html/manual/configure.html
@@ -116,7 +116,8 @@
 	the build directory, will do much the same thing, without the
 	configuration difference and without building everything twice:
 	<code class="code">make CXXFLAGS='-g3 -O0 -fno-inline' all</code>
-     </p></dd><dt><span class="term"><code class="code">--enable-libstdcxx-debug-flags=FLAGS</code></span></dt><dd><p>This option is only valid when <code class="code"> --enable-debug </code>
+     </p></dd><dt><span class="term"><code class="code">--enable-libstdcxx-debug-flags=FLAGS</code></span></dt><dd><p>This option is only valid when
+	<code class="code">--enable-libstdcxx-debug</code>
 	is also specified, and applies to the debug builds only. With
 	this option, you can pass a specific string of flags to the
 	compiler to use when building the debug versions of libstdc++.
diff --git a/libstdc++-v3/doc/xml/manual/configure.xml b/libstdc++-v3/doc/xml/manual/configure.xml
index 58587e858a4..74d6db71ab4 100644
--- a/libstdc++-v3/doc/xml/manual/configure.xml
+++ b/libstdc++-v3/doc/xml/manual/configure.xml
@@ -204,7 +204,8 @@
 
  <varlistentry><term><code>--enable-libstdcxx-debug-flags=FLAGS</code></term>
 
- <listitem><para>This option is only valid when <code> --enable-debug </code>
+ <listitem><para>This option is only valid when
+	<code>--enable-libstdcxx-debug</code>
 	is also specified, and applies to the debug builds only. With
 	this option, you can pass a specific string of flags to the
 	compiler to use when building the debug versions of libstdc++.