document_position: Create a Document Position
Description
Creates a document_position, which can be used to indicate e.g. the
row + column location of the cursor in a document.
Usage
document_position(row, column)is.document_position(x)
as.document_position(x)
Arguments
row
The row (using 1-based indexing).
column
The column (using 1-based indexing).
x
An object coercable to document_position.