fix a couple of doxygen issues

Eigen/src/Core/Coeffs.h

@@ -313,6 +313,8 @@ EIGEN_STRONG_INLINE void MatrixBase<Derived>::writePacket
   derived().template writePacket<StoreMode>(index,x);
 }
 
+#ifndef EIGEN_PARSED_BY_DOXYGEN
+
 /** \internal Copies the coefficient at position (row,col) of other into *this.
   *
   * This method is overridden in SwapWrapper, allowing swap() assignments to share 99% of their code
@@ -377,4 +379,6 @@ EIGEN_STRONG_INLINE void MatrixBase<Derived>::copyPacket(int index, const Matrix
     other.derived().template packet<LoadMode>(index));
 }
 
+#endif
+
 #endif // EIGEN_COEFFS_H

Eigen/src/Core/Matrix.h

@@ -100,6 +100,7 @@
   * when the exact numbers of rows and columns are not known are compile-time, but it is known at compile-time that they cannot
   * exceed a certain value. This happens when taking dynamic-size blocks inside fixed-size matrices: in this case _MaxRows and _MaxCols
   * are the dimensions of the original matrix, while _Rows and _Cols are Dynamic.</dd>
+  * </dl>
   *
   * \see MatrixBase for the majority of the API methods for matrices
   */