;dev: cli: clarify that conf debug output goes to console

hledger/Hledger/Cli.hs

@@ -188,10 +188,13 @@ main = withGhcDebug' $ do
 
   -- let's go!
   let
+    -- Trace helpers. These always trace to stderr, even when running `hledger ui`;
+    -- that's ok as conf is a hledger cli feature for now.
     dbgIO, dbgIO1, dbgIO2 :: Show a => String -> a -> IO ()  -- this signature is needed
     dbgIO  = ptraceAtIO verboseDebugLevel
     dbgIO1 = ptraceAtIO 1
     dbgIO2 = ptraceAtIO 2
+
   dbgIO "running" prognameandversion
 
   starttime <- getPOSIXTime

hledger/Hledger/Cli/Conf.hs

@@ -75,6 +75,8 @@ confLookup cmd Conf{confSections} =
 -- Otherwise this returns the parsed Conf, and the file path.
 getConf :: RawOpts -> IO (Conf, Maybe FilePath)
 getConf rawopts
+  -- As in Cli.hs, conf debug output always goes to stderr;
+  -- that's ok as conf is a hledger cli feature for now.
   | noconf = return $ traceAt 1 "ignoring config files" (nullconf, Nothing)
   | otherwise = do
     defconfpaths <- confFilePaths