restage: New git-annex command, handles restaging unlocked files

This is much easier and less failure-prone than having the user run
git update-index --refresh themselves.

Sponsored-by: Dartmouth College's DANDI project

Command/VCycle.hs

@@ -26,7 +26,7 @@ start ::CommandStart
 start = go =<< currentView
   where
 	go Nothing = giveup "Not in a view."
-	go (Just v) = starting "vcycle" (ActionItemOther Nothing) (SeekInput [])$ do
+	go (Just v) = starting "vcycle" (ActionItemOther Nothing) (SeekInput []) $ do
 		let v' = v { viewComponents = vcycle [] (viewComponents v) }
 		if v == v'
 			then do