Add regression tests for bugs that are working now.

test/regression/249.stmt

Index: test/regression/249.stmt
diff --git a/test/regression/249.stmt b/test/regression/249.stmt
new file mode 100644
index 0000000000000000000000000000000000000000..660545705d00518bf89f7b321667097a46735d2d
--- /dev/null
+++ b/test/regression/249.stmt
@@ -0,0 +1,9 @@
+>>> (indent 8)
+        clip.onTransitionEnd
+            .where((TransitionEvent e) => e.propertyName == 'height')
+                .first.then((_) => clip.classes.add('expanded'));
+<<<
+        clip.onTransitionEnd
+            .where((TransitionEvent e) => e.propertyName == 'height')
+            .first
+            .then((_) => clip.classes.add('expanded'));