Extracts unselected text on highlighted lines and text on other lines
extract_neighbourhood(text, context)Character vector that contains highlighted area.
The context from find_active_context().
A character vector of length three.
The first element corresponds to the text on the start line that was not selected.
The second element to the text on the end line that was not selected.
The third element are the lines that are not overlapping with the highlighted text.