commit d472f751802f95635997649ea7ec71e4f725aa50
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Mon Feb 19 20:44:12 2024 +0000

    Fix "using using" typo

diff --git a/htdocs/gcc-14/porting_to.html b/htdocs/gcc-14/porting_to.html
index 901a1653..35274691 100644
--- a/htdocs/gcc-14/porting_to.html
+++ b/htdocs/gcc-14/porting_to.html
@@ -146,7 +146,7 @@ standard C mode, which can result in implicit function declarations.
 To address this, the <code>-std=c11</code> option can be
 dropped, <code>-std=gnu11</code> can be used instead,
 or <code>-std=c11 -D_DEFAULT_SOURCE</code> can be used re-enable
-common extensions.  Alternatively, projects using using Autoconf
+common extensions.  Alternatively, projects using Autoconf
 could enable <code>AC_USE_SYSTEM_EXTENSIONS</code>.
 
 <p>