doc: rust: Fix code blocks in markdown

And add a word

doc/languages-frameworks/rust.section.md

@@ -72,8 +72,8 @@ For `cargoHash` you can use:
 Per the instructions in the [Cargo Book](https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html)
 best practices guide, Rust applications should always commit the `Cargo.lock`
 file in git to ensure a reproducible build. However, a few packages do not, and
-Nix depends on this file, so if it missing you can use `cargoPatches` to apply
-it in the `patchPhase`. Consider sending a PR upstream with a note to the
+Nix depends on this file, so if it is missing you can use `cargoPatches` to
+apply it in the `patchPhase`. Consider sending a PR upstream with a note to the
 maintainer describing why it's important to include in the application.
 
 The fetcher will verify that the `Cargo.lock` file is in sync with the `src`
@@ -146,6 +146,8 @@ where they are known to differ. But there are ways to customize the argument:
  rustc.platform = { foo = ""; bar = ""; };
  };
  }
+ ```
+
  will result in:
  ```shell
  --target /nix/store/asdfasdfsadf-thumb-crazy.json # contains {"foo":"","bar":""}
@@ -156,7 +158,7 @@ path) can be passed directly to `buildRustPackage`:
 
 ```nix
 pkgs.rustPlatform.buildRustPackage {
- (...)
+ /* ... */
  target = "x86_64-fortanix-unknown-sgx";
 }
 ```