Fix style guide #3673

Job	Run time
List-Courses	6s
Contrib scripts check	1m 29s
Labs-Slides	1m 12s
Python scripts black lint check	7s
Labs (ubuntu-latest)	47s
Slides (spark_essentials)	6m 23s
Slides (static_analysis_via_compiler)	1m 53s
Slides (rust_essentials)	8m 36s
Slides (gnat_project_facility)	3m 1s
Slides (toolchain)	1m 29s
Slides (gnatsas)	5m 18s
Slides (gnat_studio)	2m 38s
Slides (advanced_exception_analysis)	2m 14s
Slides (ada_essentials)	22m 0s
Slides (misc_tools)	2m 29s
Slides (toolchain/gnat_toolchain.txt)	1m 51s
Slides (ada_essentials/advanced.txt)	3m 21s
Slides (gnatsas/standard_course.txt)	2m 6s
Slides (rust_essentials/standard_course.txt)	1m 53s
Slides (gnatdas/standard_course.txt)	2m 33s
Slides (gnat_project_facility/standard_course.txt)	1m 55s
Slides (spark_essentials/standard_course.txt)	3m 0s
Slides (gnatdas)	4m 25s
Slides (ada_essentials/standard_course.txt)	3m 49s
Slides (rust_essentials/comprehensive_course.txt)	2m 40s
Slides (gnat_studio/course.txt)	1m 47s
	1h 29m 2s

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