docs(svelte): fix setup guide

Author: mihar-22

docs/svelte-testing-library/setup.md

@@ -11,7 +11,9 @@ with any testing framework and runner you're comfortable with.
 
 1. Install Jest and Babel
 
- `npm install --save-dev jest babel-jest @babel/core @babel/preset-env`
+ ```
+ npm install --save-dev jest babel-jest @babel/core @babel/preset-env
+ ```
 
 2. Add the following to your `package.json`
 
@@ -34,9 +36,11 @@ with any testing framework and runner you're comfortable with.
 
 4. You'll need to compile the Svelte components before using them in Jest, so
  we need to install the [svelte-jest](https://github.com/ktsn/svelte-jest)
- transformer.
+ transformer
 
- `npm install --save-dev svelte-jest`
+ ```
+ npm install --save-dev svelte-jest
+ ```
 
 5. Add the following Jest configuration to your `package.json`
 
@@ -45,7 +49,7 @@ with any testing framework and runner you're comfortable with.
  "jest": {
  "transform": {
  "^.+\\.js$": "babel-jest",
- "^.+\\.svelte$": "jest-transform-svelte"
+ "^.+\\.svelte$": "svelte-jest"
  },
  "moduleFileExtensions": ["js", "json", "svelte"]
  }
@@ -54,11 +58,13 @@ with any testing framework and runner you're comfortable with.
 
 6. This is optional but it is recommended, you can install
  [jest-dom](https://github.com/testing-library/jest-dom) to add handy
- assertions to Jest.
+ assertions to Jest
 
  6.1 Install jest-dom
 
- `npm install --save-dev @testing-library/jest-dom`
+ ```
+ npm install --save-dev @testing-library/jest-dom
+ ```
 
  6.2 Add the following to your Jest configuration in `package.json`
 
@@ -69,6 +75,8 @@ with any testing framework and runner you're comfortable with.
  ```
 
 7. Create your component + test file (checkout the rest of the docs to see how)
- and run
+ and run it
 
- `npm run test`
+ ```
+ npm run test
+ ```