Remove useless code in `add`, tidy up
Fix #2094 - Update TODO example with new success callback signature
Fix #2099 - sortedIndex use model attributes for string iterator
Semicolon.
removed unused variable 'model' from 'save' function
Merge pull request #2107 from adriaanlabusc/remove_var

removed unused variable 'model' from 'save' function
Consistently turn on `parse` flag in `save`, like `fetch` already does
Simplify `sortedIndex` test