Update E306

cf PyCQA/pycodestyle#1216

crates/ruff_linter/resources/test/fixtures/pycodestyle/E30.py

@@ -349,6 +349,13 @@ class Class:
 # end
 
 
+# no error
+def f():
+    def f():
+        pass
+# end
+
+
 # E301
 class Class(object):
 
@@ -656,13 +663,6 @@ def baz():
 # end
 
 
-# E306
-def f():
-    def f():
-        pass
-# end
-
-
 # E306
 def a():
     x = 2

crates/ruff_linter/src/rules/pycodestyle/rules/logical_lines/blank_lines.rs

@@ -315,7 +315,6 @@ impl AlwaysFixableViolation for BlankLinesAfterFunctionOrClass {
 /// Use instead:
 /// ```python
 /// def outer():
-///
 ///     def inner():
 ///         pass
 ///
@@ -535,8 +534,8 @@ pub(crate) fn blank_lines(
                 && !tracked_vars.follows_decorator
                 // The class's docstring can directly precede the first function.
                 && !tracked_vars.follows_docstring
-                // Do not trigger when the def/class follows an "indenting token" (if/while/etc...), unless that "indenting token" is a def.
-                && prev_indent_level.is_some_and(|prev_indent_level| prev_indent_level >= indent_level || tracked_vars.follows_def)
+                // Do not trigger when the def/class follows an "indenting token" (if/while/etc...).
+                && prev_indent_level.is_some_and(|prev_indent_level| prev_indent_level >= indent_level)
                 // Allow groups of one-liners.
                 && !(tracked_vars.follows_def
                      && line

crates/ruff_linter/src/rules/pycodestyle/snapshots/ruff_linter__rules__pycodestyle__tests__E306_E30.py.snap

@@ -121,26 +121,6 @@ E30.py:638:5: E306 [*] Expected 1 blank line before a nested definition, found 0
 639 640 |         pass
 640 641 | # end
 
-E30.py:645:5: E306 [*] Expected 1 blank line before a nested definition, found 0
-    |
-643 | # E306
-644 | def foo():
-645 |     def bar():
-    |     ^^^ E306
-646 |         pass
-647 |     def baz(): pass
-    |
-    = help: Add missing blank line
-
-ℹ Safe fix
-642 642 | 
-643 643 | # E306
-644 644 | def foo():
-    645 |+
-645 646 |     def bar():
-646 647 |         pass
-647 648 |     def baz(): pass
-
 E30.py:647:5: E306 [*] Expected 1 blank line before a nested definition, found 0
     |
 645 |     def bar():
@@ -180,26 +160,6 @@ E30.py:654:5: E306 [*] Expected 1 blank line before a nested definition, found 0
 655 656 |         pass
 656 657 | # end
 
-E30.py:661:5: E306 [*] Expected 1 blank line before a nested definition, found 0
-    |
-659 | # E306
-660 | def f():
-661 |     def f():
-    |     ^^^ E306
-662 |         pass
-663 | # end
-    |
-    = help: Add missing blank line
-
-ℹ Safe fix
-658 658 | 
-659 659 | # E306
-660 660 | def f():
-    661 |+
-661 662 |     def f():
-662 663 |         pass
-663 664 | # end
-
 E30.py:669:5: E306 [*] Expected 1 blank line before a nested definition, found 0
     |
 667 | def a():