correct heading underline for new "Cross-compiling on Windows" section

mhammond · mhammond · commit 295814e4634b · 2008-04-07T01:59:40.000Z
diff --git a/Doc/distutils/builtdist.rst b/Doc/distutils/builtdist.rst
@@ -332,7 +332,7 @@ The installer file will be written to the "distribution directory" --- normally
 .. _cross-compile-windows:
 
 Cross-compiling on Windows
-=====================
+==========================
 
 Starting with Python 2.6, distutils is capable of cross-compiling between 
 Windows platforms.  In practice, this means that with the correct tools 
