** VC and related modes
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*** In VC directory mode, `D' displays diffs between VC-controlled
whole tree revisions.
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*** In VC directory mode, `L' lists the change log for the current VC
controlled tree in a window.
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*** In VC directory mode, `I' shows a log of changes that will be
received with a pull operation.
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*** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
under current version control system. When called with a prefix
argument, you can remove a file from the ignored file list.