[scenario 2] complete the definition of the cp command

[hchiapello]

complete this definition “The cp (copy) command copies files or directories. It takes 2 paths as argument:” by adding :"the paths may be absolute or relative paths or filenames or the current directory named with '.' "

[dputhier]

I have indicated:

          ## Copying files and directories

          The `cp` (**c**o**p**y) command copies files or directories. It takes 2 paths as argument. These paths may be absolute or relative paths or filenames or the current directory named with '.'

[dputhier]

see 59362e903bf70e5d2349003bb8da0827db0343c6