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This is done instead of picking all changes that were commited to master
and not reflected in stable.

Current master revision is 8a6d320b.

Builder.substituted doesn't change the builder in place, contrary to
what the docstring suggested.

Closes #379

Joseph Weston authored Mar 16, 2020 and Anton Akhmerov committed Mar 30, 2020

Tinyarrays used to have identical hashes to tuples, but this
was not part of the official interface. While the core of
Kwant did not depend on this implementation detail, the
tests did.

update libraries for linking against Mumps in conda-forge

See merge request !355

Recently conda-forge updated their packaging so that sequential
Mumps is a separate package,
[mumps-seq](https://anaconda.org/conda-forge/mumps-seq),
which names the libraries with a suffix '_seq' (contrary to how
Debian does it).
In addition we no longer need to explicitly link against Scotch,
pord or gfortran as the conda-forge built mumps libraries already
do this.
All tests still pass without explicitly linking against mpiseq,
so it is left out.

Fix behaviour of discretizer when locals contains numpy array values

See merge request !344

Incraese the timeout and number of retries when running the
link check on the documentation; this should increase the
specificity of the test.

See merge request kwant/kwant!332
Closes #332.

The combination of longer timeout and larger number of retries should
make the linkcheck sufficiently specific again.

Retrying > once should increase the specificity of the check a lot.

Fixup/qsymm tests

See merge request !330

sympy symbols with 'real' set differently do not hash to the same
value (and possibly do not compare equal).

__eq__ for Models just uses allclose anyway.

This is more idiomatic.

Also comment other usages of this parameter.

Qsymm is now installed in the testing image directly

Not providing these is now deprecated.
Close #325.

fix kpm.conductivity in the case where 'norbs' is not set

See merge request !321

This does not require assuming that site families have 'norbs' set.

Closes #313.

fix a bug in kwant.qsymm

See merge request !325

The test suite uses features from the 1.2 release of qsymm.

This is not an API of qsymm.

Sphinx 2 got rid of 'sphinx.main' so we can no longer use it.