Clean up all whitespace throughout project (#5578)

* Remove trailing whitespace from lines
* Remove trailing nad leading whitespace from files

Allows for cleaner diffs in future changes. For editors that
automatically clean up whitespace on save, will avoid unrelated line
changes in diffs.

Author: jdufresne

.editorconfig

@@ -0,0 +1,7 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true

.gitignore

@@ -13,6 +13,7 @@
 MANIFEST
 coverage.*
 
+!.editorconfig
 !.gitignore
 !.travis.yml
 !.isort.cfg

.tx/config

@@ -7,4 +7,3 @@ file_filter = rest_framework/locale/<lang>/LC_MESSAGES/django.po
 source_file = rest_framework/locale/en_US/LC_MESSAGES/django.po
 source_lang = en_US
 type = PO
-

docs/api-guide/caching.md

@@ -1,6 +1,6 @@
 # Caching
 
-> A certain woman had a very sharp conciousness but almost no 
+> A certain woman had a very sharp conciousness but almost no
 > memory ... She remembered enough to work, and she worked hard.
 > - Lydia Davis
 
@@ -22,9 +22,9 @@ from rest_framework.views import APIView
 from rest_framework import viewsets
 
 class UserViewSet(viewsets.Viewset):
-    
+
     # Cache requested url for each user for 2 hours
-    @method_decorator(cache_page(60*60*2))  
+    @method_decorator(cache_page(60*60*2))
     @method_decorator(vary_on_cookie)
     def list(self, request, format=None):
         content = {
@@ -35,7 +35,7 @@ class UserViewSet(viewsets.Viewset):
 class PostView(APIView):
 
     # Cache page for the requested url
-    @method_decorator(cache_page(60*60*2))  
+    @method_decorator(cache_page(60*60*2))
     def get(self, request, format=None):
         content = {
             'title': 'Post title',

docs/api-guide/generic-views.md

@@ -113,11 +113,11 @@ For example:
 
 Note that if your API doesn't include any object level permissions, you may optionally exclude the `self.check_object_permissions`, and simply return the object from the `get_object_or_404` lookup.
 
-#### `filter_queryset(self, queryset)`       
+#### `filter_queryset(self, queryset)`
 
-Given a queryset, filter it with whichever filter backends are in use, returning a new queryset.   
+Given a queryset, filter it with whichever filter backends are in use, returning a new queryset.
 
-For example:       
+For example:
 
     def filter_queryset(self, queryset):
         filter_backends = (CategoryFilter,)

docs/api-guide/permissions.md

@@ -197,15 +197,15 @@ If you need to test if a request is a read operation or a write operation, you s
 ---
 
 Custom permissions will raise a `PermissionDenied` exception if the test fails. To change the error message associated with the exception, implement a `message` attribute directly on your custom permission. Otherwise the `default_detail` attribute from `PermissionDenied` will be used.
-    
+
     from rest_framework import permissions
 
     class CustomerAccessPermission(permissions.BasePermission):
         message = 'Adding customers not allowed.'
-        
+
         def has_permission(self, request, view):
              ...
-        
+
 ## Examples
 
 The following is an example of a permission class that checks the incoming request's IP address against a blacklist, and denies the request if the IP has been blacklisted.

docs/api-guide/routers.md

@@ -58,11 +58,11 @@ For example, you can append `router.urls` to a list of existing views…
     router = routers.SimpleRouter()
     router.register(r'users', UserViewSet)
     router.register(r'accounts', AccountViewSet)
-    
+
     urlpatterns = [
         url(r'^forgot-password/$', ForgotPasswordFormView.as_view()),
     ]
-    
+
     urlpatterns += router.urls
 
 Alternatively you can use Django's `include` function, like so…
@@ -106,10 +106,10 @@ For example, if you want to change the URL for our custom action to `^users/{pk}
 
     from myapp.permissions import IsAdminOrIsSelf
     from rest_framework.decorators import detail_route
-    
+
     class UserViewSet(ModelViewSet):
         ...
-        
+
         @detail_route(methods=['post'], permission_classes=[IsAdminOrIsSelf], url_path='change-password')
         def set_password(self, request, pk=None):
             ...
@@ -124,10 +124,10 @@ For example, if you want to change the name of our custom action to `'user-chang
 
     from myapp.permissions import IsAdminOrIsSelf
     from rest_framework.decorators import detail_route
-    
+
     class UserViewSet(ModelViewSet):
         ...
-        
+
         @detail_route(methods=['post'], permission_classes=[IsAdminOrIsSelf], url_name='change-password')
         def set_password(self, request, pk=None):
             ...

docs/api-guide/schemas.md

@@ -784,4 +784,3 @@ in [OpenAPI][open-api] format.
 [api-blueprint]: https://apiblueprint.org/
 [static-files]: https://docs.djangoproject.com/en/stable/howto/static-files/
 [named-arguments]: https://docs.djangoproject.com/en/stable/topics/http/urls/#named-groups
- 

docs/api-guide/validators.md

@@ -84,7 +84,7 @@ It has two required arguments, and a single optional `messages` argument:
 The validator should be applied to *serializer classes*, like so:
 
     from rest_framework.validators import UniqueTogetherValidator
-    
+
     class ExampleSerializer(serializers.Serializer):
         # ...
         class Meta:

docs/topics/3.7-announcement.md

@@ -1,4 +1,3 @@
-
 <style>
 .promo li a {
     float: left;