Fix a number of formatter errors from the cpython repository (#5089)

## Summary

This fixes a number of problems in the formatter that showed up with
various files in the [cpython](https://github.com/python/cpython)
repository. These problems surfaced as unstable formatting and invalid
code. This is not the entirety of problems discovered through cpython,
but a big enough chunk to separate it. Individual fixes are generally
individual commits. They were discovered with #5055, which i update as i
work through the output

## Test Plan

I added regression tests with links to cpython for each entry, except
for the two stubs that also got comment stubs since they'll be
implemented properly later.

crates/ruff_python_ast/src/node.rs

@@ -4212,6 +4212,22 @@ impl AnyNodeRef<'_> {
             | AnyNodeRef::Decorator(_) => false,
         }
     }
+
+    pub const fn is_node_with_body(self) -> bool {
+        matches!(
+            self,
+            AnyNodeRef::StmtIf(_)
+                | AnyNodeRef::StmtFor(_)
+                | AnyNodeRef::StmtAsyncFor(_)
+                | AnyNodeRef::StmtWhile(_)
+                | AnyNodeRef::StmtWith(_)
+                | AnyNodeRef::StmtAsyncWith(_)
+                | AnyNodeRef::StmtMatch(_)
+                | AnyNodeRef::StmtFunctionDef(_)
+                | AnyNodeRef::StmtAsyncFunctionDef(_)
+                | AnyNodeRef::StmtClassDef(_)
+        )
+    }
 }
 
 impl<'a> From<&'a ModModule> for AnyNodeRef<'a> {