[test] Add missing return in main

See merge request !505

Unused variable warning indicated this oversight

Adapt changelog after release

See merge request !504

Feature/pip install git master

See merge request !503

Merge branch 'release29/license' into 'releases/2.9'

See merge request !500

[bugfix] dune-common module version dependency.

See merge request !501

update author list in license file

See merge request core/dune-istl!499

(cherry picked from commit 9108fc58ebbcf40305cb7ea1a8f28808b47adc16)

27471991 update author list in license file

[cleanup] Remove signed integer comparison warning.

See merge request !497

[cmake][python] Replace deprecated dune_python_install_package

See merge request !488

add SPDX information

See merge request !490

dune.module: bump version to 2.10-git

See merge request !491

See https://reuse.software/ for a description.

Fixes segfault for least squares problems with SPQR

See merge request !489

Allow SVG writer to have empty rows and cols

See merge request !484

Nested sparse matrices were not allowed to have empty rows/cols. By choosing the minimum offset of other blocks, we get an educated guess for these cases.

[doc] Remove outdated reference to dune-dd

See merge request !483

Fix memory leak on BCRSMatrix

Closes #103

See merge request !482

Before this commit, the pattern was deallocated with the wrong size that created a huge memory leak.

playground executable for experimenting with solvers and preconditioners

See merge request !410

Create sparse matrix with contiguous memory for MatrixMarket.

See merge request !481

Use dune_add_test properly

See merge request !475

[amg] fix w-cycle

See merge request !474

The current behavior (allocating each row separately ) is rather
surprising and unnecessary as the matrix market file stores the
number of nonzeros anyway. Hence we now pass this number to
BCRSMatrix::SetSize to get the most efficient behavior

Const correctness in iterative solvers

See merge request core/dune-istl!421

[cleanup][cmake] Remove CMAKE_METADATA_FILE.

See merge request !479

Remove unused-parameter warnings

See merge request !472