Move module docstring test to preview

crates/ruff_python_formatter/resources/test/fixtures/ruff/docstring_code_examples.options.json

@@ -50,11 +50,5 @@
     "docstring_code_line_width": "dynamic",
     "indent_style": "space",
     "indent_width": 4
-  },
-  {
-    "docstring_code": "enabled",
-    "preview": "enabled",
-    "indent_style": "space",
-    "indent_width": 4
   }
 ]

crates/ruff_python_formatter/resources/test/fixtures/ruff/preview.py

@@ -1,5 +1,19 @@
 """
 Black's `Preview.module_docstring_newlines`
+
+
+A code black to format
+.. code-block:: python
+
+    from bokeh.events import ButtonClick
+    from bokeh.models import Button
+
+    button = Button()
+
+    def callback(event         ):
+        print('Python:Click')
+
+    button.on_event(ButtonClick, callback)
 """
 first_stmt_after_module_level_docstring = 1
 

crates/ruff_python_formatter/resources/test/fixtures/ruff/quote_style.py

@@ -1,4 +1,4 @@
-'single'
+'single' # this string is treated as a docstring
 "double"
 r'r single'
 r"r double"

crates/ruff_python_formatter/src/preview.rs

@@ -76,7 +76,7 @@ pub(crate) const fn is_multiline_string_handling_enabled(context: &PyFormatConte
 }
 
 /// Returns `true` if the [`multiline_string_handling`](https://github.com/astral-sh/ruff/pull/9725) preview style is enabled.
-/// Black does not format docstrings https://github.com/psf/black/issues/3493 so we keep this
+/// Black does not [`format docstrings`](https://github.com/psf/black/issues/3493) so we keep this
 /// preview for compatibility with Black.
 pub(crate) const fn is_format_module_docstring_enabled(context: &PyFormatContext) -> bool {
     context.is_preview()