Add Example pop-up page - update instructions

[pczarn2]

After clicking the Add Example button, the following steps are shown. If one follows these steps, they need to perform a new step of creating new Pull request to actually merge the edits; I recommend adding step 5 with that instruction.

1. Copy the generated code below
2. Click Here to edit doc for: isDateObject
3. Update doc by adding the example in the examples section
4. Scroll to the bottom and click "Propose Change"