[wwwdocs] C++17 library is no longer experimental

[wwwdocs] C++17 library is no longer experimental

[Jonathan Wakely]

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I've committed this patch to /gcc-9/changes.html (and a follow-up to
fix some bad HTML markup).



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Index: htdocs/gcc-9/changes.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-9/changes.html,v
retrieving revision 1.63
diff -u -r1.63 changes.html
--- htdocs/gcc-9/changes.html	3 May 2019 07:52:47 -0000	1.63
+++ htdocs/gcc-9/changes.html	3 May 2019 12:24:02 -0000
@@ -644,13 +644,18 @@
 
 <h4 id="libstdcxx">Runtime Library (libstdc++)</h4>
 <ul>
-  <li>Improved experimental support for C++17, including:
+  <li>Improved support for C++17, including:
       <ul>
+      <li> The C++17 implementation is no longer experimental. </li>
       <li>
         Parallel algorithms and <code>&lt;execution&gt;</code>
         (requires TBB 2018 or newer).
       </li>
       <li> <code>&lt;memory_resource&gt;</code>. </li>
+      <li>
+        Using the types and functions in <code>&lt;filesystem&gt;</code>
+        does not require linking with <code>-lstdc++fs</code> now.
+      <li>
       </ul>
   </li>
   <li>Improved experimental support for C++2a,