message: cleanup fpde example
diff: +// MFEM Example 42
  +//
  +// Compile with: make ex42
  +//
  +// Sample runs: ex42 -m ../data/square-disc.mesh -alpha 0.33 -o 2
  +// ex42 -m ../data/star.mesh -alpha 0.99 -o 3
  +// ex42 -m ../data/inline-quad.mesh -alpha 0.2 -o 3
  +// Description:
  +//
  +
  #include "mfem.hpp"
  #include <fstream>
  #include <iostream>
  