Merging branch 'j.10'  into 'main'.

See merge request !2536

Merging branch 'j.2'  into 'main'.

See merge request !2534

[j.2] Revert "persistence tests: relax accuracy requirement in view of other architectures"; increase accuracy of .int reference data to 16 digits (#952) ()

Merging branch 'j.2'  into 'main'.

See merge request !2533

This reverts commit 13f5052a.

Merging branch 'j.0'  into 'main'.

See merge request !2530

Merging branch 'j.0'  into 'main'.

See merge request !2529

Merging branch 'j.4'  into 'main'.

See merge request !2528

Merging branch 'j.3'  into 'main'.

See merge request !2527

Merging branch 'm.i936'  into 'main'.

See merge request !2526

prevents export of inline functions, templates, etc

recommended by Craig Scott, CppCon 2019, at about 11'

Merging branch 'a.fixBA_plot'  into 'main'.

* The implicit parsing of commandline arguments is eliminated from the `ba_plot` module;
therefore, importing `ba_plot` will have no side-effects.
Originally, the implicit parsing of commandline arguments during importing led to crashes when
the module was imported in a different environment, like a Jupyter notebook.

* All global variables are removed from the `ba_plot.py` module and plot arguments are made explicit to avoid unexpected problems
due to corruption of global variables. In the originall scheme, storing the plot arguments as global variable would lead to strange
behaviour if two examples were run sequentially, since the global plot arguments would persist in the global scope from one example
to the other.

Related to #912

See merge request !2525