testsuite/run.py: Improve output readability
testsuite/run.py: Improve output readability

AdaCore/Ada_Drivers_Library,AdaCore/Ada_Drivers_Library,ellamosi/Ada_BMP_Library,simonjwright/Ada_Drivers_Library,simonjwright/Ada_Drivers_Library,Fabien-Chouteau/Ada_Drivers_Library,Fabien-Chouteau/Ada_Drivers_Library