Add Level: to manual pages currently missing it

Commit-type: documentation

Remove unneeded declarations of LOCDIR from all the makefiles

Commit-type:documentation

ViewerVTK: use header_type="UInt64" to use 64-bit byte counts in binary appended

This feature is mentioned under `HeaderType` in these docs, and seems to
have been supported for a long time.

http

ViewerVTK: use header_type="UInt64" to use 64-bit byte counts in binary appended

This feature is mentioned under `HeaderType` in these docs, and seems to
have been supported for a long time.

https://kitware.github.io/paraview-docs/v5.7.0/python/paraview.simple.XMLPUnstructuredGridWriter.html

It was not documented in the usual file format docs, which have not been
updated in ages.

https://vtk.org/wp-content/uploads/2015/04/file-formats.pdf (PDF was created in 2003)
https://kitware.github.io/vtk-examples/site/VTKFileFormats/#xml-file-formats

I've tested that these files work in Paraview and VisIt.

Thanks-to: Dave May <dave.mayhem23@gmail.com>

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Move error checking for 3d DMDA Jacobi coloring to coloring location from matrix location

Thus the error will only be triggered when it is truly an issue

Commit-type: error-checking, usability

Replace use of SETERRQ() with modern PetscCheck style

Commit-type: style

Completely trivial code formatting

Merge remote-tracking branch 'origin/release'

Fix Typos

Make PetscErrorCode a non-discardable enum