Fix whitespace

[petk]

• [x] I provide my work under the project license.
• [x] I grant such license of my work as is required for the purposes of future print editions to Ben Straub and Scott Chacon.

Changes

• One sentence per line.
• List indentation synced.
• Normal space compared to character U+00a0 is similar but more common.
• Some doubled new lines synced and removed.
• Few double whitespaces synced.

I hope that suits you also. Thanks.