Merge branch 'develop' into 'master'

Regular merge of develop

See merge request R3school/git.practice!34

README.md

 ## Repository for practice and homework
 
-The detailed instructions are [here](https://git-r3lab.uni.lu/R3.training/git.slides/blob/master/slides/homework.md).
+The detailed instructions are [here](https://git-r3lab.uni.lu/R3school/git.slides/blob/master/slides/homework.md).
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