Fix a typo.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@112926 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/www/compatibility.html b/www/compatibility.html
index 8ac7d7d..cf0d96e 100644
--- a/www/compatibility.html
+++ b/www/compatibility.html
@@ -180,7 +180,7 @@
 
 <p>Some instances of this construct may be safe if the variable is never used
 after the jump target, however the protected scope checker does not check the
-uses of the varaible, only the scopes in which it is visible. You should rewrite
+uses of the variable, only the scopes in which it is visible. You should rewrite
 your code to put the <tt>__block</tt> variables in a scope which is only visible
 where they are used.</p>