Trim trailing white space throughout the project

Many editors clean up trailing white space on save. By removing it all
in one go, it helps keep future diffs cleaner by avoiding spurious white
space changes on unrelated lines.

CODE_OF_CONDUCT.md

@@ -71,4 +71,3 @@ This Code of Conduct is adapted from the [Contributor Covenant][homepage], versi
 available at https://www.contributor-covenant.org/version/1/4/code-of-conduct.html
 
 [homepage]: https://www.contributor-covenant.org
-

LICENSE

@@ -4,10 +4,10 @@ All rights reserved.
 Redistribution and use in source and binary forms, with or without modification,
 are permitted provided that the following conditions are met:
 
-    1. Redistributions of source code must retain the above copyright notice, 
+    1. Redistributions of source code must retain the above copyright notice,
        this list of conditions and the following disclaimer.
-    
-    2. Redistributions in binary form must reproduce the above copyright 
+
+    2. Redistributions in binary form must reproduce the above copyright
        notice, this list of conditions and the following disclaimer in the
        documentation and/or other materials provided with the distribution.
 

docs/api_widgets.rst

@@ -28,7 +28,7 @@ Widgets
 
 .. autoclass:: import_export.widgets.DurationWidget
    :members:
-   
+
 .. autoclass:: import_export.widgets.JSONWidget
    :members:
 

docs/changelog.rst

@@ -17,7 +17,7 @@ Changelog
 
 - JSONWidget for jsonb fields (#803)
 
-- Add ExportActionMixin (#809) 
+- Add ExportActionMixin (#809)
 
 - Add Import Export Permissioning #608 (#804)
 
@@ -166,7 +166,7 @@ Changelog
 
 - Append rows to Result object via function call to allow overriding (#462)
 
-- Add get_resource_kwargs to allow passing request to resource (#457) 
+- Add get_resource_kwargs to allow passing request to resource (#457)
 
 - Expose Django user to get_export_data() and export() (#447)
 

import_export/mixins.py

@@ -64,7 +64,7 @@ class ExportViewMixin(object):
 
 
 class ExportViewFormMixin(ExportViewMixin, FormView):
-    def form_valid(self, form): 
+    def form_valid(self, form):
         formats = self.get_export_formats()
         file_format = formats[
             int(form.cleaned_data['file_format'])

import_export/widgets.py

@@ -269,7 +269,7 @@ class SimpleArrayWidget(Widget):
     def render(self, value, obj=None):
         return self.separator.join(six.text_type(v) for v in value)
 
-    
+
 class JSONWidget(Widget):
     """
     Widget for a JSON object (especially required for jsonb fields in PostgreSQL database.)
@@ -310,7 +310,7 @@ class ForeignKeyWidget(Widget):
 
         from import_export import fields, resources
         from import_export.widgets import ForeignKeyWidget
-        
+
         class BookResource(resources.ModelResource):
             author = fields.Field(
                 column_name='author',

tests/core/tests/test_admin_integration.py

@@ -64,7 +64,7 @@ class ImportExportAdminIntegrationTest(TestCase):
         response = self.client.post('/admin/core/book/process_import/', data,
                                     follow=True)
         self.assertEqual(response.status_code, 200)
-        self.assertContains(response, 
+        self.assertContains(response,
             _('Import finished, with {} new and {} updated {}.').format(
                 1, 0, Book._meta.verbose_name_plural)
         )
@@ -101,7 +101,7 @@ class ImportExportAdminIntegrationTest(TestCase):
         response = self.client.post('/admin/core/book/process_import/', data,
                                     follow=True)
         self.assertEqual(response.status_code, 200)
-        self.assertContains(response, 
+        self.assertContains(response,
             _('Import finished, with {} new and {} updated {}.').format(
                 1, 0, Book._meta.verbose_name_plural)
         )