Pasting a note between two paragraphs containing notes

[shaundillon]

To reproduce:

• Create 2 paragraphs and add a note to each:
  
• Copy some text containing a note and paste that as a new paragraph between the existing ones:
  

Effect:
A new note is created from the start of the copied note, through to the end of the last note.

I've done some investigation into this and here are my findings:
in generate-note-controller the isPasteInsideNote function checks if you're pasting content inside a note, and then calls wrap-in-note-around-paste if this is the case. This is incorrectly assuming you're pasting inside a note.

There is a branch with a scribe instance and noting set up here: https://github.com/guardian/scribe/tree/sd-fix-noting