MarkDeprecated and NormalizeFunc as alias results in an inconsistent deprecation message

[andersjanmyr]

cmd.Flags().StringVar(&src, "dir", "", "deprecated, use src")
cmd.Flags().MarkDeprecated("dir", "dir has been renamed src")
cmd.Flags().StringVar(&src, "src", "", "src directory or file")
cmd.Flags().SetNormalizeFunc(aliasNormalizeFunc)

$ go run . --dir=test
Flag --src has been deprecated, dir has been renamed src

[tomasaschan]

This issue has not been updated in a long time. Is it still relevant?

(If I receive no answer before the end of the summer, I'll close it. Feel free to re-open if you come here after that happens and it is relevant to you - but if you do, please also comment and specify what outcome you're interested in!)

[hdimer]

Still reproduces on main. With an alias set up via SetNormalizeFunc, using the alias for a deprecated flag reports the canonical name instead of the one you typed:

$ go run . --dir=test
Flag --src has been deprecated, dir has been renamed src

Parse passes the normalized flag.Name into Set, so the typed name is lost before the message is built. Outcome I'd want: report the flag as typed, Flag --dir has been deprecated, .... Opened #500 with a small fix.