fix wording

Author: Vladimir Kotal

intro.tex

@@ -1353,7 +1353,7 @@
 change \texttt{RUNPATH}, for example.
 \end{itemize}
 \item \label{EVIL_LDLIBPATH} In general, you should not use
-\texttt{LD\_LIBRARY\_PATH} for anything else then debugging during the
+\texttt{LD\_LIBRARY\_PATH} for anything else than debugging during the
 development or when moving libraries between directories.  You can find lots of
 articles on ``why is \texttt{LD\_LIBRARY\_PATH} evil?'' etc.  For example,
 \url{http://xahlee.org/UnixResource\_dir/\_/ldpath.html}.