Used more augmented assignment statements.

Identified using the following command:

$ git grep -I '\(\<[_a-zA-Z0-9]\+\>\) *= *\1 *[-+/*^%&|<>@]'

3 files changed, 9 insertions, 12 deletions

diff --git a/tests/admin_inlines/tests.py b/tests/admin_inlines/tests.py
index ad7446e1ca..73f888d9d3 100644
--- a/tests/admin_inlines/tests.py
+++ b/tests/admin_inlines/tests.py
@@ -1908,11 +1908,9 @@ class SeleniumTests(AdminSeleniumTestCase):
             "border-top-%s",
         ]
         for prop in border_properties:
-            prop = prop % "width"
-            self.assertEqual(element.value_of_css_property(prop), width)
+            self.assertEqual(element.value_of_css_property(prop % "width"), width)
         for prop in border_properties:
-            prop = prop % "style"
-            self.assertEqual(element.value_of_css_property(prop), style)
+            self.assertEqual(element.value_of_css_property(prop % "style"), style)
         # Convert hex color to rgb.
         self.assertRegex(color, "#[0-9a-f]{6}")
         r, g, b = int(color[1:3], 16), int(color[3:5], 16), int(color[5:], 16)
@@ -1923,8 +1921,7 @@ class SeleniumTests(AdminSeleniumTestCase):
             "rgba(%d, %d, %d, 1)" % (r, g, b),
         ]
         for prop in border_properties:
-            prop = prop % "color"
-            self.assertIn(element.value_of_css_property(prop), colors)
+            self.assertIn(element.value_of_css_property(prop % "color"), colors)
 
     def test_inline_formset_error_input_border(self):
         from selenium.webdriver.common.by import By
diff --git a/tests/forms_tests/tests/test_media.py b/tests/forms_tests/tests/test_media.py
index 171b70e508..aa508cb415 100644
--- a/tests/forms_tests/tests/test_media.py
+++ b/tests/forms_tests/tests/test_media.py
@@ -643,7 +643,7 @@ class FormsMediaTestCase(SimpleTestCase):
         self.assertEqual(
             merged._css, {"screen": ["c.css", "a.css"], "all": ["d.css", "e.css"]}
         )
-        merged = merged + widget3
+        merged += widget3
         # widget3 contains an explicit ordering of c.css and a.css.
         self.assertEqual(
             merged._css,
diff --git a/tests/migrations/test_loader.py b/tests/migrations/test_loader.py
index 847b937d5a..800d715bc9 100644
--- a/tests/migrations/test_loader.py
+++ b/tests/migrations/test_loader.py
@@ -390,7 +390,7 @@ class LoaderTests(TestCase):
         loader.build_graph()
 
         plan = set(loader.graph.forwards_plan(("app1", "4_auto")))
-        plan = plan - loader.applied_migrations.keys()
+        plan -= loader.applied_migrations.keys()
         expected_plan = {
             ("app2", "1_squashed_2"),
             ("app1", "3_auto"),
@@ -529,7 +529,7 @@ class LoaderTests(TestCase):
         # Load with nothing applied: both migrations squashed.
         loader.build_graph()
         plan = set(loader.graph.forwards_plan(("app1", "4_auto")))
-        plan = plan - loader.applied_migrations.keys()
+        plan -= loader.applied_migrations.keys()
         expected_plan = {
             ("app1", "1_auto"),
             ("app2", "1_squashed_2"),
@@ -548,7 +548,7 @@ class LoaderTests(TestCase):
         loader.replace_migrations = False
         loader.build_graph()
         plan = set(loader.graph.forwards_plan(("app1", "3_auto")))
-        plan = plan - loader.applied_migrations.keys()
+        plan -= loader.applied_migrations.keys()
         expected_plan = {
             ("app1", "1_auto"),
             ("app2", "1_auto"),
@@ -564,7 +564,7 @@ class LoaderTests(TestCase):
         self.record_applied(recorder, "app1", "2_auto")
         loader.build_graph()
         plan = set(loader.graph.forwards_plan(("app1", "4_auto")))
-        plan = plan - loader.applied_migrations.keys()
+        plan -= loader.applied_migrations.keys()
         expected_plan = {
             ("app2", "1_squashed_2"),
             ("app1", "3_auto"),
@@ -576,7 +576,7 @@ class LoaderTests(TestCase):
         self.record_applied(recorder, "app2", "1_auto")
         loader.build_graph()
         plan = set(loader.graph.forwards_plan(("app1", "4_auto")))
-        plan = plan - loader.applied_migrations.keys()
+        plan -= loader.applied_migrations.keys()
         expected_plan = {
             ("app2", "2_auto"),
             ("app1", "3_auto"),