Image links in markdown documents

[dannyparsons]

In case I haven't mentioned this to everyone before, when adding image links to a markdown file they need to be in a certain format so that will correctly convert to pdf files.

See the change here where I updated the image link https://github.com/africanmathsinitiative/R-Instat/wiki/Introductory-Tutorial:-Part-1---Describing-Data/_compare/0542d3f210d8388ca5afe789adc466f8a8cdaa1f...b8ae742d33e7a5ebae0f446ff9b4e1a3c4c130b3

It is just the raw.githubusercontent at the start and removing the /blob.

You won't notice any difference in the online version but when I make the pdfs it won't convert without that change. So just remember to modify the link in this way when adding images. Thanks.

[berylwaswa]

I am modifying them. Thanks.

[dannyparsons]

They are all correct already in the first two guides as I have just created PDF versions of them.