Some docs polish

@arturi

website/src/docs/xhrupload.md

@@ -22,42 +22,46 @@ uppy.use(XHRUpload, {
 
 This plugin is published as the `@uppy/xhr-upload` package.
 
+Install from NPM:
+
 ```shell
 npm install @uppy/xhr-upload
 ```
 
 ## Options
 
+The XHRUpload plugin has the following configurable options:
+
 ### `id: 'XHRUpload'`
 
-A unique identifier for this plugin. Defaults to `'XHRUpload'`.
+A unique identifier for this plugin. It defaults to `'XHRUpload'`.
 
 ### `endpoint: ''`
 
-URL to upload to.
+The destination URL for your uploads.
 
 ### `method: 'post'`
 
-HTTP method to use for the upload.
+Configures which HTTP method to use for the upload.
 
 ### `formData: true`
 
-Whether to use a multipart form upload, using [FormData][].
+Configures whether or not to use a multipart form upload, using [FormData][].
 This works similarly to using a `<form>` element with an `<input type="file">` for uploads.
-When `true`, file metadata is also sent to the endpoint as separate form fields.
-When `false`, only the file contents are sent.
+When set to `true`, file metadata is also sent to the endpoint as separate form fields.
+When set to `false`, only the file contents are sent.
 
 ### `fieldName: 'files[]'`
 
-When `formData` is true, this is used as the form field name for the file to be uploaded.
+When `formData` is set to true, this is used as the form field name for the file to be uploaded.
 
 ### `metaFields: null`
 
 Pass an array of field names to limit the metadata fields that will be sent to the endpoint as form fields.
 For example, `metaFields: ['name']` will only send the `name` field.
-Passing `null` (the default) will send *all* metadata fields.
+Setting this to `null` (the default) will send *all* metadata fields.
 
-If the `formData` option is false, `metaFields` has no effect.
+If the `formData` option is set to false, `metaFields` has no effect.
 
 ### `headers: {}`
 
@@ -72,9 +76,9 @@ headers: {
 
 ### `bundle: false`
 
-Send all files in a single multipart request. When `bundle` is `true`, `formData` must also be set to `true`.
+Send all files in a single multipart request. When `bundle` is set to `true`, `formData` must also be set to `true`.
 
-> Note: When `bundle` is `true`, file metadata is **not** sent to the endpoint. This is because it's not obvious how metadata should be sent when there are multiple files in a single request. If you need this, please open an issue and we'll try to figure it out together.
+> Note: When `bundle` is set to `true`, file metadata is **not** sent to the endpoint. This is because it is not obvious how metadata should be sent when there are multiple files in a single request. If you need this, please open an issue and we will try to figure it out together.
 
 All files will be appended to the provided `fieldName` field in the request. To upload files on different fields, use [`uppy.setFileState()`](/docs/uppy#uppy-setFileState-fileID-state) to set the `xhrUpload.fieldName` property on the file:
 
@@ -156,11 +160,11 @@ When no upload progress events have been received for this amount of millisecond
 Note that unlike the [`XMLHttpRequest.timeout`][XHR.timeout] property, this is a timer between progress events: the total upload can take longer than this value.
 Set to `0` to disable this check.
 
-The default is 30 seconds.
+The default for the timeout is 30 seconds.
 
 ### `limit: 0`
 
-Limit the amount of uploads going on at the same time. Passing `0` means no limit.
+Limit the amount of uploads going on at the same time. Setting this to `0` means there is no limit on concurrent uploads.
 
 ### `withCredentials: false`
 
@@ -219,7 +223,7 @@ $file_name = $_POST['name']; // desired name of the file
 move_uploaded_file($file_path, './img/' . basename($file_name)); // save the file in `img/`
 ```
 
-Note how we're using `$_POST['name']` instead of `$my_file['name']`. `$my_file['name']` contains the original name of the file on the user's device. `$_POST['name']` contains the `name` metadata value for the uploaded file, which can be edited by the user using the [Dashboard](/docs/dashboard).
+Note how we are using `$_POST['name']` instead of `$my_file['name']`. `$my_file['name']` contains the original name of the file on the user's device. `$_POST['name']` contains the `name` metadata value for the uploaded file, which can be edited by the user using the [Dashboard](/docs/dashboard).
 
 Set a custom `fieldName` to make working with the `$_FILES` array a bit less convoluted: