Merge branch 'while' into grammar-tweaks

src/compiler/tests/while.test.ts

@@ -34,4 +34,15 @@ describe('while', () => {
       b`)
       .toEvaluateTo(100)
   })
+
+  test('returns value', () => {
+    expect(`
+      a = 0
+      ret = while a < 10: 
+        a += 1
+        done
+      end
+      ret`)
+      .toEvaluateTo('done')
+  })
 })