Confused by git am error message.

[a user confusion report]
I was updating my patch series manually aand made a mistake, so the 
series didn't apply properly. However the error message confused me.

    ...
    Applying: Doc clean: add See Also links
    fatal: corrupt patch at line 17
    Patch failed at 0008 Doc clean: add See Also links
    When you have resolved this problem run "git am --resolved".
    ...

In my case I resolved the _patch_ error, and then expected that doing 
the 'git am --resolved' would try to re-apply the patch and continue 
happily - I had checked that the status was clean - but it didn't.

    Philip@PHILIPOAKLEY /c/msysgit179/git (nextDoc|AM)
    $ git am --resolved
    Applying: Doc clean: add See Also links
    No changes - did you forget to use 'git add'?
    If there is nothing left to stage, chances are that something else
    already introduced the same changes; you might want to skip this 
patch.

I'm not quite sure what the 'right' answer should be, maybe a --reapply 
option, or slightly different words in the message to highlight that the 
user is to make their worktree/index look like the patch _had_ applied, 
or something else?

Philip