trivial: Formatting in default fixture loop scope message

style: reformatting

docs: Add news fragment.

Author: JayBazuzi

changelog.d/1298.changed.rst

@@ -0,0 +1 @@
+Improved the readability of the warning message that is displayed when ``asyncio_default_fixture_loop_scope`` is unset

pytest_asyncio/plugin.py

@@ -221,10 +221,10 @@ def _get_asyncio_debug(config: Config) -> bool:
 
 _DEFAULT_FIXTURE_LOOP_SCOPE_UNSET = """\
 The configuration option "asyncio_default_fixture_loop_scope" is unset.
-The event loop scope for asynchronous fixtures will default to the fixture caching \
+The event loop scope for asynchronous fixtures will default to the "fixture" caching \
 scope. Future versions of pytest-asyncio will default the loop scope for asynchronous \
-fixtures to function scope. Set the default fixture loop scope explicitly in order to \
-avoid unexpected behavior in the future. Valid fixture loop scopes are: \
+fixtures to "function" scope. Set the default fixture loop scope explicitly in order \
+to avoid unexpected behavior in the future. Valid fixture loop scopes are: \
 "function", "class", "module", "package", "session"
 """