Fix some typos

[malikwirin]

fixed some smaller typos and a bigger one where a false path caused some confusion for me while reading the book.

[welcome]

(Image: CC-BY license, The Turing Way Community, & Scriberia. Zenodo. https://doi.org/10.5281/zenodo.3332808) Wohoo! 🎉 Thanks for opening your first pull request to the DataLad Handbook! 😎 We really appreciate your time and effort to contribute to the project - you're amazing! 👏

[adswa]

Thanks a lot for this PR, it is much appreciated! I approve, though the last commit needs to be dropped or modified before I can merge (see my comment)

[adswa]

@all-contributors please add @malikwirin for bug

@malikwirin feel free to add yourself to the .zenodo.json file of this repository, at the second to last position, before "Michael Hanke" (or leave Name, and optionally Orcid and affilliation in a comment, and I'll add you)

[allcontributors]

@adswa

I've put up a pull request to add @malikwirin! 🎉

[adswa]

Thanks much!

[welcome]

(Image: CC-BY license, The Turing Way Community, & Scriberia. Zenodo. https://doi.org/10.5281/zenodo.3332808) Congrats on merging your first pull request! 🎉 The DataLad Handbook team appreciates your contribution greatly, and we want to say thanks! 💖 Now go ahead and share your first merge with your colleagues, you got yourself this brag right! 😄 🎁