add another minify() options example (#1988)

README.md

@@ -321,7 +321,8 @@ var code = {
     "file2.js": "console.log(add(1 + 2, 3 + 4));"
 };
 var result = UglifyJS.minify(code);
-console.log(result.code);  // function add(d,n){return d+n}console.log(add(3,7));
+console.log(result.code);
+// function add(d,n){return d+n}console.log(add(3,7));
 ```
 
 The `toplevel` option:
@@ -332,7 +333,33 @@ var code = {
 };
 var options = { toplevel: true };
 var result = UglifyJS.minify(code, options);
-console.log(result.code);  // console.log(function(n,o){return n+o}(3,7));
+console.log(result.code);
+// console.log(function(n,o){return n+o}(3,7));
+```
+
+An example of a combination of `minify()` options:
+```javascript
+var code = {
+    "file1.js": "function add(first, second) { return first + second; }",
+    "file2.js": "console.log(add(1 + 2, 3 + 4));"
+};
+var options = {
+    toplevel: true,
+    compress: {
+        global_defs: {
+            "@console.log": "alert"
+        },
+        passes: 2
+    },
+    output: {
+        beautify: false,
+        preamble: "/* uglified */"
+    }
+};
+var result = UglifyJS.minify(code, options);
+console.log(result.code);
+// /* uglified */
+// alert(10);"
 ```
 
 To produce warnings: