fix dx fmt span attribute issue (#5132)

* fix: if expr spans causing invalid span locations

* cleanups

* clippy, typo

packages/autofmt/tests/samples/expr_on_conditional.rsx

@@ -0,0 +1,14 @@
+//! A comment about this file
+
+use dioxus::prelude::*;
+
+#[component]
+pub fn Sample() -> Element {
+    let is_active = use_signal(|| false);
+
+    rsx! {
+        div { class: if is_active() { "active" } else { "inactive" },
+            div { class: if is_active2() { "a" } else { "b" } }
+        }
+    }
+}