small fix to have the aliasing documentation appear on the web site.

3cf71a0f · Frederic Bastien · 577f8920 · 3cf71a0f
--- a/doc/tutorial/aliasing.txt
+++ b/doc/tutorial/aliasing.txt
-.. _basictutaliasing:
+.. _aliasing:
 =======================================================
 Understanding Memory Aliasing for Speed and Correctness