Fix typo.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77244 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/LangRef.html b/docs/LangRef.html
index 7858e63..1f9f80d 100644
--- a/docs/LangRef.html
+++ b/docs/LangRef.html
@@ -1252,7 +1252,7 @@
 <div class="doc_text">
 
 <p>Any memory access must be done though a pointer value associated
-with with address range of the memory access, otherwise the behavior
+with an address range of the memory access, otherwise the behavior
 is undefined. Pointer values are associated with address ranges
 according to the following rules:</p>