add alt texts to the images of the git book

Hey there,

the book at https://git-scm.com/book/en/v2 (which is awesome btw, thanks for that!), contains a lot of images that are inaccessible to me because I am visually impaired. Not sure if they are really really important, but in some cases it was a little bit complicated to follow some examples, more specifically, in the branching chapter.

Some outputs were pasted as plain text, which was much easier to follow, and I wonder if would be possible in the future to have all outputs pasted as plain text for easier reading?

Thanks.

Hi Lucas,

Please find the "The source of this book is hosted on GitHub" link on the left side of the page you linked to. You are cordially invited to contribute patches, suggestions and comments in that project's bug tracker.

Ciao,
Johannes