JS: Format if statements with no else on a single line

test/codegen/expect/sunflower/sunflower.js

 dart_library.library('sunflower/sunflower', null, /* Imports */[
   "dart/_runtime",
   'sunflower/dom',
   'dart/core',
   'dart/math',
   'sunflower/painter',
   'sunflower/circle'
 ], /* Lazy imports */[
 ], function(exports, dart, dom, core, math, painter, circle) {
   'use strict';
@@ skipping 38 matching lines @@
       let r = dart.notNull(math.sqrt(i)) * dart.notNull(SCALE_FACTOR);
       let x = dart.notNull(centerX) + dart.notNull(r) * dart.notNull(math.cos(theta));
       let y = dart.notNull(centerY) - dart.notNull(r) * dart.notNull(math.sin(theta));
       new SunflowerSeed(x, y, SEED_RADIUS).draw(exports.context);
     }
     exports.notes.textContent = `${exports.seeds} seeds`;
   }
   dart.fn(draw, dart.void, []);
   class SunflowerSeed extends dart.mixin(circle.Circle, painter.CirclePainter) {
     SunflowerSeed(x, y, radius, color) {
-      if (color === void 0)
-        color = null;
+      if (color === void 0) color = null;
       super.Circle(x, y, radius);
-      if (color != null)
-        this.color = color;
+      if (color != null) this.color = color;
     }
   }
   dart.setSignature(SunflowerSeed, {
     constructors: () => ({SunflowerSeed: [SunflowerSeed, [core.num, core.num, core.num], [core.String]]})
   });
   // Exports:
   exports.SEED_RADIUS = SEED_RADIUS;
   exports.SCALE_FACTOR = SCALE_FACTOR;
   exports.MAX_D = MAX_D;
   exports.centerX = centerX;
   exports.centerY = centerY;
   exports.querySelector = querySelector;
   exports.main = main;
   exports.draw = draw;
   exports.SunflowerSeed = SunflowerSeed;
 });