(very minnor) in session 0 : code updated, but not the comment

[vichug]

..a the 'Image manipulation > Croping images' paragraph, in the def of the imcrop_tosquare function : the comment says

The first branch says, if the rows of img are greater than the columns, then set the variable extra to their difference and divide by 2.

...whereas the variable extra is in fact not divided by 2 right away in the code. It's minnor but for a beginner (such as myself) it might be very brain freezing for a moment.
That's all :)

[pkmital]

Ah good catch!