Re: [PATCH] diffcore-pickaxe doc: document -S and -G properly

> When a commit moves a file wholesale without affecting the block of
> code you are interested in, you know that whole block came from the
> file in the old tree at pre-rename location without looking at
> anywhere else.  That is why renamed but pickaxe-uninteresting
> filepairs are dropped.
>
> When a commit moves (some lines of) the block of code you are
> interested in from one file to another, it may have been a single
> instance moving to another place, but it may well have been multiple
> copies consolidated into one (the new copy, pickaxe digging from
> future to past may see "disappearing").  That is a significant event
> worth digging into further by first stopping there and then
> inspecting the whole change with --pickaxe-all to see what changes
> that are similar to the change in question exist in the other parts
> (notice the multiple) of the tree.