Move to the previous hunk-start (@code{diff-hunk-prev}).  With prefix argument @var{n}, move back to the @var{n}th previous hunk.  Like @kbd{M-n}, this <del>has the side-effect of refining</del> <ins>command refines</ins> the hunk you move <del>to, unless</del> <ins>to if</ins> you <del>disable Diff Auto-Refine mode.</del> <ins>set @code{diff-refine} to the symbol @code{navigation}.</ins>