It is. And I see you have flagged the jagoff. Revisionism can not stand against the facts - no matter how much posts you people spew to the contrary.
Lee inherited slaves from his father-in-law, Mr. Custis, whose will provided that the slaves be freed in five years. In keeping with the will, the slaves were freed at the end of that period. This happened because of Custis's expressed intention, not because of any particular virtue or desire on Lee's part.