giving the version number when asked for is NOT an error, therefore
output now goes to stdout (cf. Coding Standards)
------- version ----------------------------------------------------
- , ( "-version" , NoArg (do hPutStrLn stderr (cProjectName
+ , ( "-version" , NoArg (do hPutStrLn stdout (cProjectName
++ ", version " ++ version_str)
exitWith ExitSuccess))
- , ( "-numeric-version", NoArg (do hPutStrLn stderr version_str
+ , ( "-numeric-version", NoArg (do hPutStrLn stdout version_str
exitWith ExitSuccess))
------- verbosity ----------------------------------------------------