message: Improving the wording of a comment
diff: // Define macro wrappers for hypre_TAlloc, hypre_CTAlloc and hypre_TFree:
  // mfem_hypre_TAlloc, mfem_hypre_CTAlloc, and mfem_hypre_TFree, respectively.
  -// Note: the same macros are used in hypre.cpp, hypre_parcsr.cpp, and perhaps
  +// Note: these macros are used in hypre.cpp, hypre_parcsr.cpp, and perhaps
  // other locations in the future.
  #if MFEM_HYPRE_VERSION < 21400
  