Previously a lot of the code blocks in markdown files were horribly indented with bad white spaces in the beginning of lines. Users can't just select, copy, paste, and run (in the case of python). I have fixed all these, so there is no longer any code block with bad white space at the beginning of the lines.
It would be nice if you could try to make sure in future commits that all code blocks are properly indented inside and have the right amount of white space in the beginning!

Change indent from 3 spaces to 4, and add "\" for multiline bash commands