capitalize Cargo.toml

README.md

@@ -11461,7 +11461,7 @@ To begin learning external crates, we will start with the most common one: `rand
 
 ### rand
 
-Did you notice that we didn't use any random numbers yet? That's because random numbers aren't in the standard library. But there are a lot of crates that are "almost standard library" because everybody uses them. In any case, it's very easy to bring in a crate. If you have Rust on your computer, there is a file called `cargo.toml` that has this information. A `cargo.toml` file looks like this when you start:
+Did you notice that we didn't use any random numbers yet? That's because random numbers aren't in the standard library. But there are a lot of crates that are "almost standard library" because everybody uses them. In any case, it's very easy to bring in a crate. If you have Rust on your computer, there is a file called `Cargo.toml` that has this information. A `Cargo.toml` file looks like this when you start:
 
 ```text
 [package]
@@ -11492,7 +11492,7 @@ rand = "0.7.3"
 
 And then Cargo will do the rest for you. Then you can start writing code like [this example code](https://docs.rs/rand/0.7.3/rand/) on the `rand` document website. To get to the documents you can click on the `docs` button in [the page on crates.io](https://crates.io/crates/rand).
 
-So that's enough about Cargo: we are still using just the Playground. Luckily, the Playground already has the top 100 crates installed. So you don't need to write in `cargo.toml` yet. On the Playground you can imagine that it has a long list like this with 100 crates:
+So that's enough about Cargo: we are still using just the Playground. Luckily, the Playground already has the top 100 crates installed. So you don't need to write in `Cargo.toml` yet. On the Playground you can imagine that it has a long list like this with 100 crates:
 
 ```text
 [dependencies]
@@ -11506,7 +11506,7 @@ That means that to use `rand`, you can just do this.
 ```rust
 use rand; // This means the whole crate rand
           // On your computer you can't just write this;
-          // you need to write in the cargo.toml file first
+          // you need to write in the Cargo.toml file first
 
 fn main() {
     for _ in 0..5 {
@@ -13421,7 +13421,7 @@ By the way, the `--release` part of the command is called a `flag`. That means e
 Some other things you need to know are:
 
 - `cargo new`. You do this to create a new Rust project. After `new`, write the name of the project and `cargo` will make the folder and all the files you need.
-- `cargo clean`. When you add crates to `cargo.toml`, the computer will download all the files it needs and they can take a lot of space. If you don't want them on your computer anymore, type `cargo clean`.
+- `cargo clean`. When you add crates to `Cargo.toml`, the computer will download all the files it needs and they can take a lot of space. If you don't want them on your computer anymore, type `cargo clean`.
 
 One more thing about the compiler: it only takes the most time when you use `cargo build` or `cargo run` the first time. After that it will remember, and it will compile fast again. But if you use `cargo clean` and then run `cargo build`, it will have to compile slowly one more time.