Merge branch 'jolivet/feature-rm-spaces-plurals' into 'main'

Remove unneeded spaces/plurals

See merge request petsc/petsc!5193

Remove extra spaces and unwanted plurals

Merge branch 'jed/plex-schwarz-p' into 'main'

DMPlexCreateTPSMesh: triply-periodic surface meshing

See merge request petsc/petsc!2709

DMPlexCreateTPSMesh: triply-periodic surface meshing

Mesh the surface of the Schwarz P surface with an arbitrary number of
refinements. Thanks to Nikita Simonian and Matthias Messner for
bringing t

DMPlexCreateTPSMesh: triply-periodic surface meshing

Mesh the surface of the Schwarz P surface with an arbitrary number of
refinements. Thanks to Nikita Simonian and Matthias Messner for
bringing these surfaces to my attention and for meshing discussion.

This commit squashes a line of development started in April 2020, with
some merges and conflict resolution with bug fixes and features needed
from upstream.

Add DMPlexCreateGyroidMesh(): will be folded into DMPlexCreateTPSMesh()

https://en.wikipedia.org/wiki/Gyroid

DMPlexCreateTPSMesh: add Face Sets and better output checking

DMPlexCreateTPSMesh: add edge sets for gyroid

DMPlexCreateTPSMesh: fix precision issues

DMPlexCreateTPSMesh: support extrusion to 3D mesh (broken because Face Sets are missing)

DMSetCoordinatesLocal: allow NULL to clear any prior coordinates

DMPlex: add -dm_plex_shape [schwarz_p|gyroid]

Skip distribution before extrusion due to parallel bug #1114.

Co-authored-by: Toby Isaac <tisaac@cc.gatech.edu>

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