message: make style so tests can run
diff: @@ -4374,7 +4374,7 @@ static PetscErrorCode __mfem_mat_shell_apply(Mat A, Vec x, Vec y)
  PetscFunctionBeginUser;
  ierr = MatShellGetContext(A,(void **)&op); CHKERRQ(ierr);
  - if (!op) SETERRQ(PetscObjectComm((PetscObject)A),PETSC_ERR_LIB,"Missing operator");
  + if (!op) { SETERRQ(PetscObjectComm((PetscObject)A),PETSC_ERR_LIB,"Missing operator"); }
  mfem::PetscParVector xx(x,true);
  mfem::PetscParVector yy(y,true);
  op->Mult(xx,yy);
  @@ -4390,7 +4390,7 @@ static PetscErrorCode __mfem_mat_shell_apply_transpose(Mat A, Vec x, Vec y)
  PetscFunctionBeginUser;
  ierr = MatShellGetContext(A,(void **)&op); CHKERRQ(ierr);
  - if (!op) SETERRQ(PetscObjectComm((PetscObject)A),PETSC_ERR_LIB,"Missing operator");
  + if (!op) { SETERRQ(PetscObjectComm((PetscObject)A),PETSC_ERR_LIB,"Missing operator"); }
  mfem::PetscParVector xx(x,true);
  mfem::PetscParVector yy(y,true);
  op->MultTranspose(xx,yy);
  @@ -4406,7 +4406,7 @@ static PetscErrorCode __mfem_mat_shell_copy(Mat A, Mat B, MatStructure str)
  PetscFunctionBeginUser;
  ierr = MatShellGetContext(A,(void **)&op); CHKERRQ(ierr);
  - if (!op) SETERRQ(PetscObjectComm((PetscObject)A),PETSC_ERR_LIB,"Missing operator");
  + if (!op) { SETERRQ(PetscObjectComm((PetscObject)A),PETSC_ERR_LIB,"Missing operator"); }
  ierr = MatShellSetContext(B,(void *)op); CHKERRQ(ierr);
  PetscFunctionReturn(0);
  }
  