COMP: Fix warnings caused by a backslash at the end of a comment.

Change-Id: Ibd9659d3bce4e6676b0feacf9d6acb0306b6e3da

Common/Core/vtkMath.h

@@ -665,14 +665,14 @@ public:
   // The output is provided by overwriting the input A with a matrix of the same size as
   // A containing all of the information about L and U. If the output matrix is
   // \f$ A* = \left( \begin{array}{cc}
-  // a & b \\
+  // a & b \\ %
   // c & d \end{array} \right)\f$
   // then L and U can be obtained as:
   // \f$ L = \left( \begin{array}{cc}
-  // 1 & 0 \\
+  // 1 & 0 \\ %
   // c & 1 \end{array} \right)\f$
   // \f$ U = \left( \begin{array}{cc}
-  // a & b \\
+  // a & b \\ %
   // 0 & d \end{array} \right)\f$
   //
   // That is, the diagonal of the resulting A* is the diagonal of U. The upper right