Fixes to autofmt, make it more aggressive (#2230)

* fix: fmt unterminated if, be more aggressive with line splits

* Fix: Handle long exprs in for/if statements

packages/autofmt/tests/samples/trailing_expr.rsx

@@ -1,7 +1,10 @@
 fn it_works() {
     rsx! {
         div {
-            span { "Description: ", {package.description.as_deref().unwrap_or("❌❌❌❌ missing")} }
+            span {
+                "Description: "
+                {package.description.as_deref().unwrap_or("❌❌❌❌ missing")}
+            }
         }
     }
 }