wip: code formatting nits continued

test/replace.spec.js

@@ -0,0 +1,9 @@
+import replace from '../src/replace';
+
+describe('replace', () => {
+    it('should replace the matched pattern', () => {
+        const string = 'abcde';
+        expect(replace(string, 'de', '123')).toBe('abc123');
+        expect(replace(string, /[bd]/g, '-')).toBe('a-c-e');
+    });
+});