Detect moved or copied lines within a file. When a commitmoves or copies a block of lines (e.g. the original filehas A and then B, and the commit changes it to B and thenA), the traditional blame algorithm notices only half ofthe movement and typically blames the lines that were movedup (i.e. B) to the parent and assigns blame to the lines thatwere moved down (i.e. A) to the child commit. With thisoption, both groups of lines are blamed on the parent byrunning extra passes of inspection.