intro: improve formatting (#206)

intro.md

@@ -15,17 +15,18 @@ All of these solutions work together to solve a bigger problem.
 ## Design patterns in Rust
 
 There are many problems that share the same form.
-Due to the fact that Rust is not object-oriented design patterns vary with respect to other object-oriented programming languages.
-While the details are different, since they have the same form they can be solved using the same fundamental methods.
-
-[Design patterns](./patterns/index.md) are methods to solve common problems when writing software.
-
-[Anti-patterns](./anti_patterns/index.md) are methods to solve these same common problems.
-
-However, while design patterns give us benefits, anti-patterns create more problems.
-
-[Idioms](./idioms/index.md) are guidelines to follow when coding.
-They are social norms of the community.
-You can break them, but if you do you should have a good reason for it.
+Due to the fact that Rust is not object-oriented design patterns vary with
+respect to other object-oriented programming languages.
+While the details are different, since they have the same form they can be
+solved using the same fundamental methods:
+
+- [Design patterns](./patterns/index.md) are methods to solve common problems
+  when writing software.
+- [Anti-patterns](./anti_patterns/index.md) are methods to solve these same
+  common problems. However, while design patterns give us benefits,
+  anti-patterns create more problems.
+- [Idioms](./idioms/index.md) are guidelines to follow when coding.
+  They are social norms of the community.
+  You can break them, but if you do you should have a good reason for it.
 
 TODO: Mention why Rust is a bit special - functional elements, type system, borrow checker