removed bad joke, i was tired then...

src/3_generators_pin.md

@@ -518,7 +518,6 @@ Thanks to [PR#45337][pr45337] you can actually run code like the one in our
 example in Rust today using the `static` keyword on nightly. Try it for
 yourself:
 
-
 ```rust
 #![feature(generators, generator_trait)]
 use std::ops::{Generator, GeneratorState};

src/4_pin.md

@@ -12,9 +12,8 @@
 We already got a brief introduction of `Pin` in the previous chapters, so we'll
 start off without any further introduction.
 
-Let's jump strait to some definitions and then create a set of rules to remember. Let's call them the 10 commandments of Pinning. Unfortunately, my stonemasonry
-skills are rather poor, so we'll have to settle by writing them in markdown
-(for now).
+Let's jump strait to some definitions and then create 10 rules to remember when
+we work with `Pin`.
 
 ## Definitions