If I put the following jacascript in the console:
var SomeEvent = db.events.findOne(

{ Name: 'Some stupid event' }

);
SomeEvent.Summary =
"Some Text.\r\n\r\n" +
"Some more text.";
db.events.save(SomeEvent);
db.events.findOne(

{ Name: 'Some stupid event' }

);
I get the following:
> var SomeEvent = db.events.findOne(

{ Name: 'Some stupid event' }

);
> SomeEvent.Summary =

Expected behavior of the shell would be to hold the line ending in equals in a buffer and append the next line to it before executing.