⭐ Merited by mikeywith (1)
Keep in mind that LoyceV has that data in a .txt file, so for you to convert it to CSV you going to need a workaround, and the easiest one would be using MS Excel.
Or you could simply rename the file from blockdata.txt to blockdata.csv 
No need to convert anything... a .csv is a plaintext file... it's just got the .csv extenstion to indicate that the data contained in the text file is in "comma separated value" format... ie. it is just a bunch of rows/columns where the column delimiter is "," and, optionally, the first row is column headers.