Grammar tweak.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64765 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/InternalsManual.html b/docs/InternalsManual.html
index 2497cc6..7b6d201 100644
--- a/docs/InternalsManual.html
+++ b/docs/InternalsManual.html
@@ -161,7 +161,7 @@
 is that the former are ignored by default, and the later warn by default.  The
 <tt>WARNING</tt> severity is used for constructs that are valid in the currently
 selected source language but that are dubious in some way.  The <tt>NOTE</tt>
-level is used to staple more information onto a previous diagnostics.
+level is used to staple more information onto previous diagnostics.</p>
 
 <p>These <em>severities</em> are mapped into a smaller set (the
 Diagnostic::Level enum, {<tt>Ignored</tt>, <tt>Note</tt>, <tt>Warning</tt>,