Improve test output readability

test/CMakeLists.txt

test/data/nodes/dynexite_exam_test.cpp

test/data/nodes/first_try_test.cpp

test/data/nodes/passing_limit_test.cpp

test/data/nodes/student_data_test.cpp

test/data/nodes/user_grade_boundaries_test.cpp

test/data/nodes/user_grade_config_test.cpp

test/data/nodes/user_point_config_test.cpp

test/data/testable_objects.cpp

test/file_io/csv_parser_test.cpp

test/util/grade_test.cpp

test/util/heuristics_test.cpp

test/util/numeric_test.cpp

test/util/print_types.cpp

test/util/print_types.hpp

test/util/storage_helper_test.cpp

test/view/main_window/point_histogram_test.cpp

test/view/randomize_settings.cpp