Remove and prevent trailing whitespace (#10199)

* Remove trailing whitespace.

* Add no-trailing-whitespace extra test.

* Re-add needed trailing whitespace.

* Remove one more trailing whitespace.

antsibull-nox.toml

@@ -24,6 +24,18 @@ run_no_unwanted_files = true
 no_unwanted_files_module_extensions = [".py"]
 no_unwanted_files_yaml_extensions = [".yml"]
 run_action_groups = true
+run_no_trailing_whitespace = true
+no_trailing_whitespace_skip_paths = [
+    "tests/integration/targets/iso_extract/files/test.iso",
+    "tests/integration/targets/java_cert/files/testpkcs.p12",
+    "tests/integration/targets/one_host/files/testhost/tmp/opennebula-fixtures.json.gz",
+    "tests/integration/targets/one_template/files/testhost/tmp/opennebula-fixtures.json.gz",
+    "tests/integration/targets/setup_flatpak_remote/files/repo.tar.xz",
+]
+no_trailing_whitespace_skip_directories = [
+    "tests/unit/plugins/modules/interfaces_file/interfaces_file_fixtures/golden_output/",
+    "tests/unit/plugins/modules/interfaces_file/interfaces_file_fixtures/input/",
+]
 
 [[sessions.extra_checks.action_groups_config]]
 name = "consul"

tests/integration/targets/ini_file/tasks/tests/01-value.yml

@@ -532,14 +532,7 @@
 
 - name: test-value 20 - set expected content and get current ini file content
   set_fact:
-    expected20: |+
-      
-      [extensions]
-      evolve = 
-      regress = 
-      improve = 
-      [foobar]
-      foo = 
+    expected20: "\n[extensions]\nevolve = \nregress = \nimprove = \n[foobar]\nfoo = \n"
     content20: "{{ output_content.content | b64decode }}"
 
 - name: test-value 20 - Verify content of ini file is as expected

tests/integration/targets/kernel_blacklist/handlers/main.yml

@@ -7,4 +7,3 @@
   ansible.builtin.file:
     path: /etc/modprobe.d
     state: absent
-