An array representing spacers in the modified side of the diff. Indices are line numbers in the modified document, and values are the height in lines of the spacer directly above the given line. If a value is missing for a line number, the corresponding spacer is assumed to have zero height.
An array representing spacers in the original side of the diff. Indices are line numbers in the original document, and values are the height in lines of the spacer directly above the given line. If a value is missing for a line number, the corresponding spacer is assumed to have zero height.
An array respresenting a mapping of line numbers for the diff. Indices are line numbers in the original document, and values are the corresponding line numbers in the modified document. If a value is missing for a line number, it is assumed that the line was deleted.