Add column width.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152115 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/LangRef.html b/docs/LangRef.html
index 9019cb1..008ae6a 100644
--- a/docs/LangRef.html
+++ b/docs/LangRef.html
@@ -3182,6 +3182,7 @@
    following key-value pairs:</p>
 
 <table border="1" cellspacing="0" cellpadding="4">
+  <col width="30%">
   <tbody>
     <tr>
       <th>Key</th>