applied attribute format to mat tests and tutorials

Merge branch 'psanan-release-patch-82973' into 'main'

Developer docs, style: remove rule about using "if (!rank)" and replace all "!rank" usage with "rank == 0"

See merge request petsc/petsc!4146

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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Merge branch 'barry/2020-10-08/fix-mpi-error-codes' into 'master'

Convert MPI error type to PETSc error with string message for all MPI calls

See merge request petsc/petsc!3326

Convert MPI error type to PETSc error with string message for all MPI calls

Now PETSc examples will ONLY return PETSc error codes and never MPI error codes directly so we can understand and post-pro

Convert MPI error type to PETSc error with string message for all MPI calls

Now PETSc examples will ONLY return PETSc error codes and never MPI error codes directly so we can understand and post-process their
errors better.

The test harness will now automatically retry tests that fail with MPI, this may help with Intel MPI that produces
seemingly random failures.

Commit-type: error-checking
/spend 30m

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Merge remote-tracking branch 'origin/release' into master

Merge branch 'hzhang/fix-matgetrowmaxabs_xbaij/release' into 'release'

bugfix for MatGetRowMaxAbs_MPIBAIJ(); add more tests for BAIJ and SBAIJ

See merge request petsc/petsc!3315

bugfix for MatGetRowMaxAbs_MPIBAIJ(); add more tests for BAIJ and SBAIJ

Merge branch 'hzhang/fix-matgetrowmax/maint' into 'master'

bugfix for MatGetRowMax_xxxAIJ

See merge request petsc/petsc!3177

fix MatGetRowMaxAbs() for MPIBAIJ

fix MatGetRowMinAbs() for AIJ matrix

fix MatGetRowMaxAbs() for AIJ matrix

fix MatGetRowMin_ for SeqAIJ and MPIAIJ

bugfix for MatGetRowMax_xxxAIJ
Reported-by: Sajid Ali <sajidsyed2021@u.northwestern.edu>

Merge branch 'jed/promote-examples-tests-tutorials' [petsc/petsc!2610]

* jed/promote-examples-tests-tutorials:
Promote examples/{tests,tutorials}/ to {tests,tutorials}/

Promote examples/{tests,tutorials}/ to {tests,tutorials}/

This shortens paths and improves consistency between test target names
and paths to the source and output files. Most of the work was
compl

Promote examples/{tests,tutorials}/ to {tests,tutorials}/

This shortens paths and improves consistency between test target names
and paths to the source and output files. Most of the work was
completed by this script, followed by mild cleanup of nonconforming
cases.

for makefile in `git ls-files 'src/*makefile'`; do
if rg -q 'DIRS.*\bexamples\b' $makefile; then
base=$(dirname $makefile)
dirs=$(cd $base/examples && ls -d tests tutorials 2>/dev/null | xargs echo)
perl -pi -e "s#^(DIRS.*)\bexamples\b#\1${dirs}#" $makefile
git rm $base/examples/makefile
for t in $dirs; do
git mv $base/examples/$t $base/
perl -pi -e "s#^(LOCDIR[[:space:]]*=).*#\1 $base/$t/#" $base/$t
done
fi
done

git grep -l -E -z 'examples/(tutorials|tests)' | xargs -0 perl -pi -e 's#examples/(tutorials|tests)#\1#g'
git checkout @ \
src/docs/website/documentation/changes/ \
src/benchmarks/results/

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