I'm particularly interested in what the presenter, Damian Conway, in this talk is doing as he selects the end of visual-block to effortlessly add quotes.
In particular - what is happening around 36:57
and around 37:02 mark as he adds these quotes?
I gather he is making use of the DragVisuals which he authored to yank/duplicate the blocks of text. But it's the wizadry (IMO) he applies to the second block to wrap it in quotes, is not part of DragVisuals, and that part is really what I would like to decipher.
The vertical blue bar looks like a CursorColumn being activated but it's also doing something in addition to pasting text at the beginnging and end around it.
I've looked high-and-low and I reckon he's making use of another/custom plugin (but what?) but any insights into what is happening here would greatly help as I've come back to this over the years always wanting to adopt the same.
Note: I am aware of many other ways to accomplish the same outcome, using
:'<,'>norm A' or
A' in Visual Block mode, etc. I am not asking how to wrap blocks of texts with quotes but rather - what is happening in this video.