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/fat_exprs.rsx

@@ -0,0 +1,31 @@
+//! Exprs that are too long to fit on one line
+
+fn it_works() {
+    rsx! {
+        div {
+            if thing
+                .some_long_method_that_is_too_long_to_fit_on_one_line()
+                .some_long_method_that_is_too_long_to_fit_on_one_line()
+                .some_long_method_that_is_too_long_to_fit_on_one_line({
+                    chain()
+                        .some_long_method_that_is_too_long_to_fit_on_one_line()
+                        .some_long_method_that_is_too_long_to_fit_on_one_line()
+                })
+            {
+                "hi"
+            }
+
+            for item in thing
+                .some_long_method_that_is_too_long_to_fit_on_one_line()
+                .some_long_method_that_is_too_long_to_fit_on_one_line()
+                .some_long_method_that_is_too_long_to_fit_on_one_line({
+                    chain()
+                        .some_long_method_that_is_too_long_to_fit_on_one_line()
+                        .some_long_method_that_is_too_long_to_fit_on_one_line()
+                })
+            {
+                "hi"
+            }
+        }
+    }
+}