indent with tabs not spaces

Found these with:
git grep "^  " $(find -type  f -name \*.hs) |grep -v ':  where'

Unfortunately there is some inline hamlet that cannot use tabs for
indentation.

Also, Assistant/WebApp/Bootstrap3.hs is a copy of a module and so I'm
leaving it as-is.

Annex/TaggedPush.hs

@@ -49,13 +49,13 @@ fromTaggedBranch b = case split "/" $ Git.fromRef b of
 
 taggedPush :: UUID -> Maybe String -> Git.Ref -> Remote -> Git.Repo -> IO Bool
 taggedPush u info branch remote = Git.Command.runBool
-        [ Param "push"
-        , Param $ Remote.name remote
+	[ Param "push"
+	, Param $ Remote.name remote
 	{- Using forcePush here is safe because we "own" the tagged branch
 	 - we're pushing; it has no other writers. Ensures it is pushed
 	 - even if it has been rewritten by a transition. -}
-        , Param $ Git.Branch.forcePush $ refspec Annex.Branch.name
-        , Param $ refspec branch
-        ]
+	, Param $ Git.Branch.forcePush $ refspec Annex.Branch.name
+	, Param $ refspec branch
+	]
   where
 	refspec b = Git.fromRef b ++ ":" ++ Git.fromRef (toTaggedBranch u info b)