Fix #2104: fmt incorrectly using 1-indexing for columns (#2106)

* Fix #2104: fmt incorrectly using 1-indexing for columns

* Clippy...

packages/autofmt/tests/wrong/oneline-expand.wrong.rsx

@@ -0,0 +1,8 @@
+fn main() {
+    rsx! {
+        button {
+            id: "start_stop",
+            onclick: move |_| timer.with_mut(|t| t.started_at = if t.started_at.is_none() { Some(Instant::now()) } else { None } )
+        }
+    }
+}