Fix E30X panics on blank lines with trailing white spaces

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

@@ -436,6 +436,15 @@ def b():
 # end
 
 
+# no error
+def test():
+    pass
+
+  # Wrongly indented comment
+    pass
+# end
+
+
 # E301
 class Class(object):
 
@@ -534,6 +543,20 @@ def g():
 # end
 
 
+# E302
+class Test:
+
+	pass
+
+	def method1():
+		return 1
+
+
+	def method2():
+		return 22
+# end
+
+
 # E303
 def fn():
     _ = None
@@ -648,6 +671,15 @@ def b(self):
 # end
 
 
+# E303
+def fn():
+    pass
+
+
+    pass
+# end
+
+
 # E304
 @decorator
 

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

@@ -501,7 +501,6 @@ impl BlankLines {
                 }
             }
             BlankLines::Many { count, range } => {
-                assert_eq!(range.end(), line_range.start());
                 *count = count.saturating_add(1);
                 *range = TextRange::new(range.start(), line_range.end());
             }

crates/ruff_linter/src/rules/pycodestyle/snapshots/ruff_linter__rules__pycodestyle__tests__E301_E30.py.snap

@@ -1,44 +1,44 @@
 ---
 source: crates/ruff_linter/src/rules/pycodestyle/mod.rs
 ---
-E30.py:444:5: E301 [*] Expected 1 blank line, found 0
+E30.py:453:5: E301 [*] Expected 1 blank line, found 0
     |
-442 |     def func1():
-443 |         pass
-444 |     def func2():
+451 |     def func1():
+452 |         pass
+453 |     def func2():
     |     ^^^ E301
-445 |         pass
-446 | # end
+454 |         pass
+455 | # end
     |
     = help: Add missing blank line
 
 ℹ Safe fix
-441 441 | 
-442 442 |     def func1():
-443 443 |         pass
-    444 |+
-444 445 |     def func2():
-445 446 |         pass
-446 447 | # end
+450 450 | 
+451 451 |     def func1():
+452 452 |         pass
+    453 |+
+453 454 |     def func2():
+454 455 |         pass
+455 456 | # end
 
-E30.py:455:5: E301 [*] Expected 1 blank line, found 0
+E30.py:464:5: E301 [*] Expected 1 blank line, found 0
     |
-453 |         pass
-454 |     # comment
-455 |     def fn2():
+462 |         pass
+463 |     # comment
+464 |     def fn2():
     |     ^^^ E301
-456 |         pass
-457 | # end
+465 |         pass
+466 | # end
     |
     = help: Add missing blank line
 
 ℹ Safe fix
-451 451 | 
-452 452 |     def fn1():
-453 453 |         pass
-    454 |+
-454 455 |     # comment
-455 456 |     def fn2():
-456 457 |         pass
+460 460 | 
+461 461 |     def fn1():
+462 462 |         pass
+    463 |+
+463 464 |     # comment
+464 465 |     def fn2():
+465 466 |         pass