Fix spelling mistake: wierd*hacks --> weird*hacks
Also add a testcase.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@265 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/memcheck/docs/manual.html b/memcheck/docs/manual.html
index 8ada25f..24f0d2b 100644
--- a/memcheck/docs/manual.html
+++ b/memcheck/docs/manual.html
@@ -565,7 +565,7 @@
       described in detail in <a href="#cache">Section 7</a>.
       </li><br><p>
 
-  <li><code>--wierd-hacks=hack1,hack2,...</code>
+  <li><code>--weird-hacks=hack1,hack2,...</code>
       Pass miscellaneous hints to Valgrind which slightly modify the
       simulated behaviour in nonstandard or dangerous ways, possibly
       to help the simulation of strange features.  By default no hacks