message: Fixing a typo (comment).
diff: @@ -166,7 +166,7 @@ public:
  /** Combine the blocks making up this complex operator into a single
  SparseMatrix. The resulting matrix can be passed to solvers which require
  access to the matrix entries themselves, such as sparse direct solvers,
  - rather than simply the action of the opertor. Note that this combined
  + rather than simply the action of the operator. Note that this combined
  operator requires roughly twice the memory of the block structured
  operator. */
  SparseMatrix * GetSystemMatrix() const;
  