Use underscore-prefixed helpers in documentation

docs/08-common-pitfalls.md

@@ -8,7 +8,7 @@ If you use [ESLint](http://eslint.org/), you can install [eslint-plugin-ava](htt
 
 ### Transpiling imported modules
 
-AVA currently only transpiles the tests you ask it to run, as well as test helpers (files starting with `_` or in `helpers` directory) inside the test directory. *It will not transpile modules you `import` from outside of the test.* This may be unexpected but there are workarounds.
+AVA currently only transpiles test and helper files. *It will not transpile modules you `import` from outside of the test.* This may be unexpected but there are workarounds.
 
 If you use Babel you can use its [require hook](https://babeljs.io/docs/usage/require/) to transpile imported modules on-the-fly. To add it, [configure it in your `package.json`](./06-configuration.md).
 

docs/recipes/browser-testing.md

@@ -22,9 +22,9 @@ $ npm install --save-dev browser-env
 
 ## Setup browser-env
 
-Create a helper file and place it in the `test/helpers` folder. This ensures AVA does not treat it as a test.
+Create a helper file, prefixed with an underscore. This ensures AVA does not treat it as a test.
 
-`test/helpers/setup-browser-env.js`:
+`test/_setup-browser-env.js`:
 
 ```js
 import browserEnv from 'browser-env';
@@ -58,7 +58,7 @@ Configure AVA to `require` the helper before every test file.
 {
 	"ava": {
 		"require": [
-			"./test/helpers/setup-browser-env.js"
+			"./test/_setup-browser-env.js"
 		]
 	}
 }

docs/recipes/puppeteer.md

@@ -10,7 +10,7 @@ Translations: [Français](https://github.com/avajs/ava-docs/blob/master/fr_FR/do
 
 The first step is setting up a helper to configure the environment:
 
-`./test/helpers/withPage.js`
+`./test/_withPage.js`
 
 ```js
 import puppeteer from 'puppeteer';
@@ -33,7 +33,7 @@ export default async function withPage(t, run) {
 
 ```js
 import test from 'ava';
-import withPage from './helpers/withPage';
+import withPage from './_withPage';
 
 const url = 'https://google.com';
 

docs/recipes/vue.md

@@ -23,14 +23,14 @@ The first step is setting up a helper to configure the environment to transpile
 {
 	"ava": {
 		"require": [
-			"./test/helpers/setup.js"
+			"./test/_setup.js"
 		]
 	}
 }
 ```
 
 ```js
-// ./test/helpers/setup.js
+// ./test/_setup.js
 
 // Setup browser environment
 require('browser-env')();