Fix a typo.

llvm-svn: 33118
diff --git a/llvm/docs/LangRef.html b/llvm/docs/LangRef.html
index 5e3527e..e9daca0 100644
--- a/llvm/docs/LangRef.html
+++ b/llvm/docs/LangRef.html
@@ -2734,7 +2734,7 @@
 cast is considered a <i>no-op cast</i> because no bits change (only the type 
 changes).</p>
 
-<p>When zero extending from i1, the result will alwasy be either 0 or 1.</p>
+<p>When zero extending from i1, the result will always be either 0 or 1.</p>
 
 <h5>Example:</h5>
 <pre>