Well, if at all possible don't do that.
If you really must do that, then use a good version control system (=== git) to track you changes.
Also, consider a commenting convention to mark the changes inline too.
Well, if at all possible don't do that.
If you really must do that, then use a good version control system (=== git) to track you changes.
Also, consider a commenting convention to mark the changes inline too.