Additional PetscInt_FMT empty string and SETERRQ trailing newline fixes

remove trailing newline from SETERRQ

Merge remote-tracking branch 'origin/release'

fortran: use,intrinsic :: iso_c_binding

> Fatal Error: File 'iso_c_binding.mod' opened at (1) is not a GNU Fortran module file compilation terminated.

Make clearer failure message when hdf5open fails on read file

Otherwise it prints a huge stack of HDF5 error messages that are not useful

Commit-type: error-checking, debugability
\spend 10m

apply PETSC_ATTRIBUTE_FORMAT and related fixes to sys sources

Viewer+HDF5: Added a default timestepping flag for backwards compatibility - Add a default timestepping flag - Added PetscViewerHDF5SetDefaultTimestepping() and PetscViewerHDF5GetDefaultTimestepping(

Viewer+HDF5: Added a default timestepping flag for backwards compatibility - Add a default timestepping flag - Added PetscViewerHDF5SetDefaultTimestepping() and PetscViewerHDF5GetDefaultTimestepping() - Added -viewer_hdf5_default_timestepping

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Merge branch 'barry/2021-06-10/fix-chkerrq' into 'main'

Fix missing ierr =, removed incorrect CHKERRQ(), change CHKStringError

See merge request petsc/petsc!4078

CHKSTRINGERROR() -> CHKERRSTR(), ierr -> err, and other CHK**() fixes

add PetscViewerFlush_HDF5()

Merge remote-tracking branch 'origin/release'

PetscViewerHDF5OpenGroup: proper error message if group doesn't exist

Style: replace "!rank" with "rank == 0"

In SF tutorial ex1 (src/vec/is/sf/tutorials/ex1.c), add parentheses around "rank == 0". This is relevant because ! binds more tightly than +, but == binds les

Style: replace "!rank" with "rank == 0"

In SF tutorial ex1 (src/vec/is/sf/tutorials/ex1.c), add parentheses around "rank == 0". This is relevant because ! binds more tightly than +, but == binds less
tightly, so the result of the computation would otherwise change.

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Fix manpages: Argument --> Parameter (required to enable sowing checks)

Fix manpages: mismatching number of parameters