filter out control characters in warning messages

Converted warning and similar to use StringContainingQuotedPath. Most
warnings are static strings, some do refer to filepaths that need to be
quoted, and others don't need quoting.

Note that, since quote filters out control characters of even
UnquotedString, this makes all warnings safe, even when an attacker
sneaks in a control character in some other way.

When json is being output, no quoting is done, since json gets its own
quoting.

This does, as a side effect, make warning messages in json output not
be indented. The indentation is only needed to offset warning messages
underneath the display of the file they apply to, so that's ok.

Sponsored-by: Brett Eisenberg on Patreon

Command/Smudge.hs

@@ -5,6 +5,8 @@
  - Licensed under the GNU AGPL version 3 or higher.
  -}
 
+{-# LANGUAGE OverloadedStrings #-}
+
 module Command.Smudge where
 
 import Command
@@ -142,7 +144,7 @@ clean' file mk passthrough discardreststdin emitpointer =
 		Right Nothing -> notpointer
 		Left InvalidAppendedPointerFile -> do
 			toplevelWarning False $
-				"The file \"" ++ fromRawFilePath file ++ "\" looks like git-annex pointer file that has had other content appended to it"
+				"The file " <> QuotedPath file <> " looks like git-annex pointer file that has had other content appended to it"
 			notpointer
 
 	notpointer = inRepo (Git.Ref.fileRef file) >>= \case
@@ -329,5 +331,5 @@ updateSmudged restage = streamSmudged $ \k topf -> do
 					else Database.Keys.addInodeCaches k [ic]
 			Nothing -> liftIO (isPointerFile f) >>= \case
 				Just k' | k' == k -> toplevelWarning False $
-					"unable to populate worktree file " ++ fromRawFilePath f
+					"unable to populate worktree file " <> QuotedPath f
 				_ -> noop