style: fix pylint 4.x line-too-long violations

pylint was upgraded from 3.x to 4.x by make upgrade, which now enforces
the 120-char line limit more strictly.

- cms/envs/devstack.py, production.py: split long lines in triple-quoted
  string literals (Markdown text, so Python newlines become spaces — no
  content change)
- test_containers.py: add pylint disable/enable around OLX assertion block
  where XML attribute strings cannot be split

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

Author: feanil

cms/envs/devstack.py

@@ -344,9 +344,11 @@ def should_show_debug_toolbar(request):  # lint-amnesty, pylint: disable=missing
     access token endpoint: `{LMS_ROOT_URL}/oauth2/access_token`.
     Please see separately provided documentation.
     \n - How to test: You must be logged in as course author for whatever course you want to test with.
-    You can use the [Swagger UI](https://{CMS_BASE}/authoring-api/ui/) to "Try out" the API with your test course. To do this, you must select the "Local" server.
+    You can use the [Swagger UI](https://{CMS_BASE}/authoring-api/ui/) to "Try out" the API
+    with your test course. To do this, you must select the "Local" server.
     \n - Public vs. Local servers: The "Public" server is where you can reach the API externally. The "Local" server is
-    for development with a local edx-platform version,  and for use via the [Swagger UI](https://{CMS_BASE}/authoring-api/ui/).
+    for development with a local edx-platform version,  and for use via the
+    [Swagger UI](https://{CMS_BASE}/authoring-api/ui/).
     \n - Swaggerfile: [Download link](https://{CMS_BASE}/authoring-api/schema/)''',
     'VERSION': '0.1.0',
     'SERVE_INCLUDE_SCHEMA': False,

cms/envs/production.py

@@ -409,9 +409,11 @@ def get_env_setting(setting):
     access token endpoint: `{LMS_ROOT_URL}/oauth2/access_token`.
     Please see separately provided documentation.
     \n - How to test: You must be logged in as course author for whatever course you want to test with.
-    You can use the [Swagger UI](https://{CMS_BASE}/authoring-api/ui/) to "Try out" the API with your test course. To do this, you must select the "Local" server.
+    You can use the [Swagger UI](https://{CMS_BASE}/authoring-api/ui/) to "Try out" the API
+    with your test course. To do this, you must select the "Local" server.
     \n - Public vs. Local servers: The "Public" server is where you can reach the API externally. The "Local" server is
-    for development with a local edx-platform version,  and for use via the [Swagger UI](https://{CMS_BASE}/authoring-api/ui/).
+    for development with a local edx-platform version,  and for use via the
+    [Swagger UI](https://{CMS_BASE}/authoring-api/ui/).
     \n - Swaggerfile: [Download link](https://{CMS_BASE}/authoring-api/schema/)''',
     'VERSION': '0.1.0',
     'SERVE_INCLUDE_SCHEMA': False,

openedx/core/djangoapps/content_libraries/tests/test_containers.py

@@ -840,6 +840,7 @@ def test_copy_container(self) -> None:
         # Test the actual OLX in the clipboard:
         olx_data = staging_api.get_staged_content_olx(clipboard_data.content.id)
         assert olx_data is not None
+        # pylint: disable=line-too-long
         assert olx_data == textwrap.dedent(f"""\
           <chapter copied_from_block="{self.section_with_subsections["id"]}" copied_from_version="2" display_name="Section with subsections">
             <sequential copied_from_block="{self.subsection["id"]}" copied_from_version="1" display_name="Subsection Alpha"/>
@@ -858,6 +859,7 @@ def test_copy_container(self) -> None:
             <sequential copied_from_block="{self.subsection_3["id"]}" copied_from_version="1" display_name="Test Subsection 3"/>
           </chapter>
         """)
+        # pylint: enable=line-too-long
 
     def test_publish_subsection(self) -> None:
         """