Fix return annotation

Planeshifter · Planeshifter · commit 3938a0deb7ad · 2018-03-24T21:08:09.000-04:00
diff --git a/TODO.md b/TODO.md
@@ -618,7 +618,7 @@
                 throw error;
             }
             console.log( data.toString() );
-            // returns '...'
+            // => '...'
         }
         ```
 
