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.

Remote/Helper/Encryptable.hs

@@ -58,7 +58,7 @@ encryptionSetup c = maybe genCipher updateCipher $ extractCipher c
 		Just "shared" -> use "encryption setup" . genSharedCipher
 			=<< highRandomQuality
 		-- hybrid encryption is the default when a keyid is
-                -- specified but no encryption
+		-- specified but no encryption
 		_ | maybe (M.member "keyid" c) (== "hybrid") encryption ->
 			use "encryption setup" . genEncryptedCipher key Hybrid
 				=<< highRandomQuality
@@ -88,10 +88,10 @@ encryptionSetup c = maybe genCipher updateCipher $ extractCipher c
 		(&&) (maybe True ( /= "false") $ M.lookup "highRandomQuality" c)
 			<$> fmap not (Annex.getState Annex.fast)
 	c' = foldr M.delete c
-                -- git-annex used to remove 'encryption' as well, since
-                -- it was redundant; we now need to keep it for
-                -- public-key encryption, hence we leave it on newer
-                -- remotes (while being backward-compatible).
+		-- git-annex used to remove 'encryption' as well, since
+		-- it was redundant; we now need to keep it for
+		-- public-key encryption, hence we leave it on newer
+		-- remotes (while being backward-compatible).
 		[ "keyid", "keyid+", "keyid-", "highRandomQuality" ]
 
 remoteCipher :: RemoteConfig -> Annex (Maybe Cipher)

Remote/Helper/Special.hs

@@ -87,7 +87,7 @@ checkPrepare checker helper k a = ifM (checker k)
 -- Use to acquire a resource when preparing a helper.
 resourcePrepare :: (Key -> (r -> Annex Bool) -> Annex Bool) -> (r -> helper) -> Preparer helper
 resourcePrepare withr helper k a = withr k $ \r ->
-        a (Just (helper r))
+	a (Just (helper r))
 
 -- A Storer that expects to be provided with a file containing
 -- the content of the key to store.