Docs: small fixes and typos

Double spaces, wrong backticks, or unneeded braces

ISDuplicate(): preserve block size

Merge remote-tracking branch 'origin/release'

Fix Typos

Make PetscErrorCode a non-discardable enum

Modernize and clean up petscsys.h

- Deprecate PETSC_NULL.
- Switch from preprocessor defines to anonymous enums for constant expressions.
- Surround macro arguments in ().
- Remove redundant casts.

Modernize and clean up petscsys.h

- Deprecate PETSC_NULL.
- Switch from preprocessor defines to anonymous enums for constant expressions.
- Surround macro arguments in ().
- Remove redundant casts.
- Clean up overly complex preprocessor defines in various PetscMem*() functions.

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Print MPI_Comm and MPI_Win by casting them to PETSC_INTPTR_T since some MPI implementations use integers, while others use pointers

PetscSF: Add Fortran Interface for PetscSFReduce

Merge branch 'jczhang/add-petscsf-fortran' into 'main'

Add Fortran binding for PetscSFGet{Leaf,Root}Ranks

See merge request petsc/petsc!5860

Merge branch 'barry/2022-12-27/rm-vecgetarray-fortran-examples' into 'main'

Replace use of VecGetArray() and friends from Fortran examples and docs

See merge request petsc/petsc!5950

Deprecate VecGetArray() and similar routines in favor of VecGetArrayF90() and similar routines, and update Docs

Commit-type: housekeeping
/spend 1h

Update examples to use VecGetArrayF90() and similar routines instead of VecGetArray() and similar routines

Commit-type: housekeeping
/spend 2h

Add manual pages for MatGetRowIJF90(), MatRestoreRowIJF90(), ISLocalToGlobalMappingGetIndicesF90(), ISLocalToGlobalMappingRestoresIndicesF90()

Commit-type: docs-only

fix

PetscSFSetGraphFromCoordinates: construct graph from fuzzy matching of coordinates

Fortran: add some notes for APIs with a different name in Fortran

SF: add Fortran binding for PetscSFGetLeaf/RootRanks

SF: revise PetscSFGetLeaf/RootRanks manual

Merge branch 'jed/dm-plex-box-sf' into 'main'

DM: parallel periodic box mesh with Z-order

See merge request petsc/petsc!5411

Fix -Wunused-parameter for CUDA files