message: RC2-related changes in CHANGELOG
diff: http://mfem.org
  -Version 4.0-RC1, Apr 11, 2019
  +Version 4.0-RC2, Apr 19, 2019
  =============================
  Requirements and Limitations
  ----------------------------
  - This is a release candidate for mfem-4.0.
  -- Use at your own risk -- not everything will work, the API may change.
  +- Use at your own risk -- not everything will work and the API may change.
  - We are looking for feedback from friendly users.
  - Unlike previous MFEM releases, this version requires a C++11 compiler.
  - GPU-related limitations:
  - * NVCC is not supported in the CMake build system yet.
  - * Element batching is currently ignored.
  + * Hypre preconditioners are not yet available in GPU mode.
  + * Only constant coefficients are currently supported on GPUs.
  * Full-assembly (on device), element assembly, and matrix-free bilinear forms
  - are not supported yet.
  - * FunctionCoefficients do not currently work on GPUs.
  + are not supported yet. Element batching is currently ignored.
  * Partial assembly kernels are not implemented yet for simplices.
  GPU support
  