Avoid crashes on Windows when printing unicode

[Anthchirp]

where the output is redirected away from the console into a pipe or
file. For this we need to ensure that stdout/stderr are UTF-8 encoded.

[codecov]

Codecov Report

Merging #1602 (2ba929d) into master (a682cc8) will decrease coverage by 0.01%.
The diff coverage is 14.28%.

@@            Coverage Diff             @@
##           master    #1602      +/-   ##
==========================================
- Coverage   66.62%   66.61%   -0.02%     
==========================================
  Files         614      614              
  Lines       68725    68734       +9     
  Branches     9567     9568       +1     
==========================================
- Hits        45789    45788       -1     
- Misses      21007    21017      +10     
  Partials     1929     1929              

[dagewa]

It's a big improvement! Before:

=============================================== short test summary info ===============================================
FAILED algorithms/scaling/test_scale.py::test_targeted_scaling_against_mtz - assert (not 0 and not b'--- Logging erro...
FAILED algorithms/scaling/test_scale.py::test_scale_single_dataset_with_options[None] - assert (not 0 and not b'--- L...
FAILED algorithms/scaling/test_scale.py::test_scale_single_dataset_with_options[reflection_selection.method=random]
FAILED algorithms/scaling/test_scale.py::test_scale_single_dataset_with_options[reflection_selection.method=intensity_ranges]
FAILED algorithms/scaling/test_scale.py::test_scale_single_dataset_with_options[reflection_selection.method=use_all]
FAILED algorithms/scaling/test_scale.py::test_scale_single_dataset_with_options[intensity_choice=sum] - assert (not 0...
FAILED algorithms/scaling/test_scale.py::test_scale_single_dataset_with_options[intensity=profile] - assert (not 0 an...
FAILED algorithms/scaling/test_scale.py::test_error_model_options[options1-expected1-tolerances1] - assert (not 0 and...
FAILED algorithms/scaling/test_scale.py::test_error_model_options[options2-expected2-tolerances2] - assert (not 0 and...
FAILED algorithms/scaling/test_scale.py::test_error_model_options[options3-expected3-tolerances3] - assert (not 0 and...
FAILED algorithms/scaling/test_scale.py::test_error_model_options[options5-expected5-tolerances5] - assert (not 0 and...
FAILED algorithms/scaling/test_scale.py::test_error_model_options[options6-expected6-tolerances6] - assert (not 0 and...
FAILED algorithms/scaling/test_scale.py::test_error_model_options[options7-expected7-tolerances7] - assert (not 0 and...
FAILED algorithms/scaling/test_scale.py::test_scale_multiple_datasets_with_options[None] - assert (not 0 and not b'--...
FAILED algorithms/scaling/test_scale.py::test_scale_multiple_datasets_with_options[combine.joint_analysis=False] - as...
FAILED algorithms/scaling/test_scale.py::test_scale_multiple_datasets_with_options[reflection_selection.method=quasi_random]
FAILED algorithms/scaling/test_scale.py::test_scale_multiple_datasets_with_options[reflection_selection.method=random]
FAILED algorithms/scaling/test_scale.py::test_scale_multiple_datasets_with_options[reflection_selection.method=intensity_ranges]
FAILED algorithms/scaling/test_scale.py::test_scale_multiple_datasets_with_options[reflection_selection.method=use_all]
FAILED algorithms/scaling/test_scale.py::test_scale_multiple_datasets_with_options[anomalous=True] - assert (not 0 an...
FAILED algorithms/scaling/test_scale.py::test_scale_physical - assert (not 0 and not b'--- Logging error ---\r\nTrace...
FAILED algorithms/scaling/test_scale.py::test_scale_and_filter_image_group_mode - assert (not 0 and not b'--- Logging...
FAILED algorithms/scaling/test_scale.py::test_scale_and_filter_image_group_single_dataset - assert (not 0 and not b'-...
FAILED algorithms/scaling/test_scale.py::test_scale_dose_decay_model - assert (not 0 and not b'--- Logging error ---\...
FAILED algorithms/scaling/test_scale.py::test_scale_best_unit_cell_d_min - assert (not 0 and not b'--- Logging error ...
FAILED algorithms/scaling/test_scale.py::test_scale_and_filter_dataset_mode - assert (not 0 and not b'--- Logging err...
FAILED algorithms/scaling/test_scale.py::test_scale_array - assert (not 0 and not b'--- Logging error ---\r\nTracebac...
FAILED algorithms/scaling/test_scale.py::test_multi_scale - AssertionError: assert (not 1)
FAILED algorithms/scaling/test_scale.py::test_targeted_scaling - assert (not 0 and not b'--- Logging error ---\r\nTra...
FAILED algorithms/scaling/test_scale.py::test_incremental_scale_workflow - assert (not 0 and not b'--- Logging error ...
FAILED algorithms/symmetry/cosym/test_cosym_analyse_datasets.py::test_cosym[P2-None-None-10-False-False-True] - Runti...
FAILED algorithms/symmetry/cosym/test_cosym_analyse_datasets.py::test_cosym[P3-None-None-20-False-False-True] - Runti...
FAILED algorithms/symmetry/cosym/test_cosym_analyse_datasets.py::test_cosym[I23-None-dimensions2-10-False-False-True]
FAILED algorithms/symmetry/cosym/test_cosym_analyse_datasets.py::test_cosym[I23-None-dimensions3-10-True-False-True]
FAILED algorithms/symmetry/cosym/test_cosym_analyse_datasets.py::test_cosym[P422-unit_cell4-None-20-True-True-True]
FAILED algorithms/symmetry/cosym/test_cosym_analyse_datasets.py::test_cosym[P321-unit_cell5-None-5-False-False-True]
FAILED algorithms/symmetry/cosym/test_cosym_analyse_datasets.py::test_cosym[C121-unit_cell6-None-5-False-False-False]
FAILED algorithms/symmetry/cosym/test_cosym_analyse_datasets.py::test_cosym[C121-unit_cell7-None-5-True-True-False]
FAILED algorithms/symmetry/cosym/test_cosym_analyse_datasets.py::test_cosym[I121-unit_cell8-None-5-False-False-True]
FAILED algorithms/symmetry/cosym/test_cosym_analyse_datasets.py::test_cosym[I121-unit_cell9-None-5-True-True-True] - ...
FAILED algorithms/symmetry/cosym/test_cosym_target.py::test_cosym_target[P2] - RuntimeError: Unsupported numpy.ndarra...
FAILED algorithms/symmetry/cosym/test_cosym_target.py::test_cosym_target[P3] - RuntimeError: Unsupported numpy.ndarra...
FAILED algorithms/symmetry/cosym/test_cosym_target.py::test_cosym_target[P6] - RuntimeError: Unsupported numpy.ndarra...
FAILED algorithms/symmetry/cosym/test_cosym_target.py::test_cosym_target[R3:h] - RuntimeError: Unsupported numpy.ndar...
FAILED algorithms/symmetry/cosym/test_cosym_target.py::test_cosym_target[I23] - RuntimeError: Unsupported numpy.ndarr...
FAILED test/algorithms/refinement/test_prediction_parameters.py::test - assert <scitbx_array_family_flex_ext.double o...
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! KeyboardInterrupt !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
c:\Users\fcx32934\sw\cctbx\conda_base\lib\multiprocessing\connection.py:811: KeyboardInterrupt
(to show a full traceback on KeyboardInterrupt use --full-trace)
=================== 46 failed, 543 passed, 1 skipped, 3 xpassed, 246 warnings in 6939.75s (1:55:39) ===================

After:

===================================================================== short test summary info =====================================================================
FAILED algorithms/scaling/test_scale.py::test_multi_scale - AssertionError: assert (not 1)
FAILED algorithms/scaling/test_scale.py::test_incremental_scale_workflow - AssertionError: assert (not 1)
FAILED algorithms/symmetry/cosym/test_cosym_analyse_datasets.py::test_cosym[P2-None-None-10-False-False-True] - RuntimeError: Unsupported numpy.ndarray element type
FAILED algorithms/symmetry/cosym/test_cosym_analyse_datasets.py::test_cosym[P3-None-None-20-False-False-True] - RuntimeError: Unsupported numpy.ndarray element type
FAILED algorithms/symmetry/cosym/test_cosym_analyse_datasets.py::test_cosym[I23-None-dimensions2-10-False-False-True] - RuntimeError: Unsupported numpy.ndarray e...
FAILED algorithms/symmetry/cosym/test_cosym_analyse_datasets.py::test_cosym[I23-None-dimensions3-10-True-False-True] - RuntimeError: Unsupported numpy.ndarray el...
FAILED algorithms/symmetry/cosym/test_cosym_analyse_datasets.py::test_cosym[P422-unit_cell4-None-20-True-True-True] - RuntimeError: Unsupported numpy.ndarray ele...
FAILED algorithms/symmetry/cosym/test_cosym_analyse_datasets.py::test_cosym[P321-unit_cell5-None-5-False-False-True] - RuntimeError: Unsupported numpy.ndarray el...
FAILED algorithms/symmetry/cosym/test_cosym_analyse_datasets.py::test_cosym[C121-unit_cell6-None-5-False-False-False] - RuntimeError: Unsupported numpy.ndarray e...
FAILED algorithms/symmetry/cosym/test_cosym_analyse_datasets.py::test_cosym[C121-unit_cell7-None-5-True-True-False] - RuntimeError: Unsupported numpy.ndarray ele...
FAILED algorithms/symmetry/cosym/test_cosym_analyse_datasets.py::test_cosym[I121-unit_cell8-None-5-False-False-True] - RuntimeError: Unsupported numpy.ndarray el...
FAILED algorithms/symmetry/cosym/test_cosym_analyse_datasets.py::test_cosym[I121-unit_cell9-None-5-True-True-True] - RuntimeError: Unsupported numpy.ndarray elem...
FAILED algorithms/symmetry/cosym/test_cosym_target.py::test_cosym_target[P2] - RuntimeError: Unsupported numpy.ndarray element type
FAILED algorithms/symmetry/cosym/test_cosym_target.py::test_cosym_target[P3] - RuntimeError: Unsupported numpy.ndarray element type
FAILED algorithms/symmetry/cosym/test_cosym_target.py::test_cosym_target[P6] - RuntimeError: Unsupported numpy.ndarray element type
FAILED algorithms/symmetry/cosym/test_cosym_target.py::test_cosym_target[R3:h] - RuntimeError: Unsupported numpy.ndarray element type
FAILED algorithms/symmetry/cosym/test_cosym_target.py::test_cosym_target[I23] - RuntimeError: Unsupported numpy.ndarray element type
FAILED test/test_plot_reflections.py::test_run - FileNotFoundError: [WinError 2] The system cannot find the file specified
FAILED test/algorithms/refinement/test_prediction_parameters.py::test - assert <scitbx_array_family_flex_ext.double object at 0x000001CD80BB1340> == approx([0.28...
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! KeyboardInterrupt !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
c:\Users\fcx32934\sw\cctbx\conda_base\lib\multiprocessing\connection.py:811: KeyboardInterrupt
(to show a full traceback on KeyboardInterrupt use --full-trace)
========================================= 19 failed, 570 passed, 1 skipped, 3 xpassed, 246 warnings in 1806.75s (0:30:06) =========================================

I'm mainly left with cosym test failures, but these seem new to me - maybe related to #1581. I'll look into more details on Monday. The KeyboardInterrupt is because pytest has started hanging at the end of the test runs. I'm not sure why, that's something that's only appeared in the last few days too.