Trivial typo fixes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128996 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/CodeGenerator.html b/docs/CodeGenerator.html
index 02869f6..4a656a2 100644
--- a/docs/CodeGenerator.html
+++ b/docs/CodeGenerator.html
@@ -2532,7 +2532,7 @@
 
 <div class="doc_text">
 
-<p>x86 has an feature which provides
+<p>x86 has a feature which provides
    the ability to perform loads and stores to different address spaces
    via the x86 segment registers.  A segment override prefix byte on an
    instruction causes the instruction's memory access to go to the specified