Fixed grammar typo.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12343 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/LangRef.html b/docs/LangRef.html
index de0ac2e..ae389d1 100644
--- a/docs/LangRef.html
+++ b/docs/LangRef.html
@@ -189,7 +189,7 @@
   <li>Unnamed values are represented as an unsigned numeric value with
 a '%'   prefix.  For example, %12, %2, %44.</li>
 </ol>
-<p>LLVM requires the values start with a '%' sign for two reasons:
+<p>LLVM requires that values start with a '%' sign for two reasons:
 Compilers don't need to worry about name clashes with reserved words,
 and the set of reserved words may be expanded in the future without
 penalty.  Additionally, unnamed identifiers allow a compiler to quickly