markdown lint

deps/README.md

@@ -3,4 +3,3 @@
 This is a stub project required for `mdbook-keeper` as a way of collecting all dependencies for `mdbook test`.
 
 Run `cargo add <crate>` in this folder or edit `Cargo.toml` in this folder to add dependencies that the Rust code embedded into the book markdown requires.
-

src/concurrency/futures.md

@@ -5,7 +5,7 @@
 In most cases, you will use this crate directly only when writing async code intended to work for multiple runtimes.
 Otherwise, use the utilities provided by the ecosystem of your choice - [Tokio](./tokio.md) for example.
 
-### Selecting futures
+## Selecting futures
 
 `Select` polls multiple futures and streams simultaneously, executing the branch for the future that finishes first. If multiple futures are ready, one will be pseudo-randomly selected at runtime.
 
@@ -34,7 +34,7 @@ fn main() {
 }
 ```
 
-### Joining futures
+## Joining futures
 
 ```rust,ignore
 async fn foo(i: u32) -> u32 { i }
@@ -47,7 +47,7 @@ let futures = vec![foo(1), foo(2), foo(3)];
 assert_eq!(futures::future::join_all(futures).await, [1, 2, 3]);
 ```
 
-### Map, then, either, flatten
+## Map, then, either, flatten
 
 The `futures` crate provides an extension trait that provides a variety of convenient adapters.
 

src/topics/documentation.md

@@ -9,7 +9,7 @@
 1) Add documentation comments to your code.
 
 ```rust,ignore
-/// This is a doc comment. It is equivalent to the next line. 
+/// This is a doc comment. It is equivalent to the next line.
 #[doc = r" This is a doc comment."]
 ```
 
@@ -39,10 +39,8 @@
 
 Any item annotated with `#[doc(hidden)]` will not appear in the documentation.
 
-
 2) Run `rustdoc src/lib.rs --crate-name <name>` or `cargo doc --open` to create a new directory, `doc` (or `target/doc` when using cargo), with a website inside.
 
-
 ## Module- or crate-level documentation
 
 Use `//!` at the top of the file (instead of `///`) for module-level documentation.
@@ -66,7 +64,6 @@ The first lines within `lib.rs` will compose the crate-level documentation front
 #![doc(html_playground_url = "https://playground.example.com/")]
 ```
 
-
 ## Badges
 
 [Shield.io]( https://shields.io/ )