[pydocstyle] Trim whitespace when removing blank lines after sectio…

…n (`D413`) (#10162)

Co-authored-by: Micha Reiser <micha@reiser.io>

crates/ruff_linter/resources/test/fixtures/pydocstyle/D413.py

@@ -57,3 +57,15 @@ def func():
 
     Returns:
         the value"""
+
+
+def func():
+    """Do something.
+
+    Args:
+        x: the value
+            with a hanging indent
+
+    Returns:
+        the value
+        """

crates/ruff_linter/src/rules/pydocstyle/rules/sections.rs

@@ -1665,21 +1665,30 @@ fn common_section(
                 .take_while(|line| line.trim().is_empty())
                 .count();
             if num_blank_lines < 2 {
-                let mut diagnostic = Diagnostic::new(
-                    BlankLineAfterLastSection {
-                        name: context.section_name().to_string(),
-                    },
-                    docstring.range(),
-                );
-                // Add a newline after the section.
-                diagnostic.set_fix(Fix::safe_edit(Edit::insertion(
+                let del_len = if num_blank_lines == 1 {
+                    // SAFETY: Guaranteed to not be None, because `num_blank_lines`is 1.
+                    context.following_lines().next_back().unwrap().text_len()
+                } else {
+                    TextSize::new(0)
+                };
+
+                let edit = Edit::replacement(
                     format!(
                         "{}{}",
                         line_end.repeat(2 - num_blank_lines),
                         docstring.indentation
                     ),
+                    context.end() - del_len,
                     context.end(),
-                )));
+                );
+
+                let mut diagnostic = Diagnostic::new(
+                    BlankLineAfterLastSection {
+                        name: context.section_name().to_string(),
+                    },
+                    docstring.range(),
+                );
+                diagnostic.set_fix(Fix::safe_edit(edit));
                 checker.diagnostics.push(diagnostic);
             }
         }

crates/ruff_linter/src/rules/pydocstyle/snapshots/ruff_linter__rules__pydocstyle__tests__D413_D413.py.snap

@@ -46,7 +46,7 @@ D413.py:13:5: D413 [*] Missing blank line after last section ("Returns")
 18 18 | 
 19 19 |     Returns:
 20 20 |         the value
-   21 |+    
+   21 |+
 21 22 |     """
 22 23 | 
 23 24 | 
@@ -75,5 +75,31 @@ D413.py:52:5: D413 [*] Missing blank line after last section ("Returns")
    59 |+        the value
    60 |+
    61 |+    """
+60 62 | 
+61 63 | 
+62 64 | def func():
 
+D413.py:63:5: D413 [*] Missing blank line after last section ("Returns")
+   |
+62 |   def func():
+63 |       """Do something.
+   |  _____^
+64 | | 
+65 | |     Args:
+66 | |         x: the value
+67 | |             with a hanging indent
+68 | | 
+69 | |     Returns:
+70 | |         the value
+71 | |         """
+   | |___________^ D413
+   |
+   = help: Add blank line after "Returns"
 
+ℹ Safe fix
+68 68 | 
+69 69 |     Returns:
+70 70 |         the value
+71    |-        """
+   71 |+
+   72 |+    """

crates/ruff_linter/src/rules/pydocstyle/snapshots/ruff_linter__rules__pydocstyle__tests__D413_sections.py.snap

@@ -44,7 +44,7 @@ sections.py:120:5: D413 [*] Missing blank line after last section ("Returns")
 122 122 |     Returns
 123 123 |     -------
 124 124 |     A value of some sort.
-    125 |+    
+    125 |+
 125 126 |     """
 126 127 | 
 127 128 | 
@@ -67,7 +67,7 @@ sections.py:170:5: D413 [*] Missing blank line after last section ("Returns")
 171 171 | 
 172 172 |     Returns
 173 173 |         -------
-    174 |+    
+    174 |+
 174 175 |     """
 175 176 | 
 176 177 | 
@@ -89,7 +89,7 @@ sections.py:519:5: D413 [*] Missing blank line after last section ("Parameters")
 520 520 | 
 521 521 |     Parameters
 522 522 |     ==========
-    523 |+    
+    523 |+
 523 524 |     """
 524 525 | 
 525 526 | 
@@ -111,7 +111,7 @@ sections.py:527:5: D413 [*] Missing blank line after last section ("Parameters")
 528 528 | 
 529 529 |     Parameters
 530 530 |     ===========
-    531 |+    
+    531 |+
 531 532 |     """
 532 533 | 
 533 534 | 
@@ -135,7 +135,7 @@ sections.py:548:5: D413 [*] Missing blank line after last section ("Args")
 551 551 |         Here's a note.
 552 552 | 
 553 553 |         returns:
-    554 |+    
+    554 |+
 554 555 |     """
 555 556 | 
 556 557 | 
@@ -159,7 +159,7 @@ sections.py:558:5: D413 [*] Missing blank line after last section ("Returns")
 561 561 |         Here's a note.
 562 562 | 
 563 563 |         Returns:
-    564 |+    
+    564 |+
 564 565 |     """
 565 566 | 
 566 567 | 
@@ -185,9 +185,7 @@ sections.py:588:5: D413 [*] Missing blank line after last section ("Parameters")
 593 593 |         A list of string parameters
 594 594 |     value:
 595 595 |         Some value
-    596 |+    
+    596 |+
 596 597 |     """
 597 598 | 
-598 599 | 
-
-
+598 599 |