Use 'black' to reformat python script #3046

Job	Run time
Labs (ubuntu-latest)	47s
Python scripts black lint check	13s
Contrib scripts check	1m 22s
Labs-Slides	1m 14s
List-Courses	6s
Slides (static_analysis_via_compiler)	1m 50s
Slides (misc_tools)	1m 56s
Slides (rust_essentials)	8m 16s
Slides (gnatsas)	4m 42s
Slides (ada_essentials)	21m 34s
Slides (advanced_exception_analysis)	1m 41s
Slides (gnatdas)	4m 17s
Slides (spark_essentials)	6m 23s
Slides (toolchain)	2m 3s
Slides (gnat_studio)	2m 8s
Slides (ada_essentials/standard_course.txt)	3m 56s
Slides (ada_essentials/advanced.txt)	3m 23s
Slides (gnat_project_facility)	3m 0s
Slides (rust_essentials/standard_course.txt)	2m 34s
Slides (rust_essentials/comprehensive_course.txt)	2m 32s
Slides (gnat_studio/course.txt)	1m 51s
Slides (gnat_project_facility/standard_course.txt)	1m 57s
Slides (spark_essentials/standard_course.txt)	2m 53s
Slides (toolchain/gnat_toolchain.txt)	2m 19s
	1h 22m 57s

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