message: Update linalg/solvers.cpp
  Applying change suggested on github.
diff: @@ -2696,7 +2696,7 @@ void ResidualBCMonitor::MonitorResidual(
  if ((it == 0 || final || bc_norm_squared > 0.0) && print)
  {
  mfem::out << " ResidualBCMonitor : b.c. residual norm = "
  - << sqrt(bc_norm_squared) << std::endl;
  + << sqrt(bc_norm_squared) << endl;
  }
  }
  