Update README.md (#1135)

Fix formatting which makes reading the doc confusing.

README.md

@@ -288,6 +288,7 @@ The transform function is expected to return an object with the desired target f
 - **`transformEntryForLocale : function (fields, locale): object`** _(required)_ – Transformation function to be applied.
   - `fields` is an object containing each of the `from` fields. Each field will contain their current localized values (i.e. `fields == {myField: {'en-US': 'my field value'}}`)
   - `locale` one of the locales in the space being transformed
+    
     The return value must be an object with the same keys as specified in `to`. Their values will be written to the respective entry fields for the current locale (i.e. `{nameField: 'myNewValue'}`). If it returns `undefined`, this the values for this locale on the entry will be left untouched.
 - **`shouldPublish : bool | 'preserve'`** _(optional)_ – Flag that specifies publishing of target entries, `preserve` will keep current states of the source entries (default `'preserve'`)