Display "Use brew upgrade foo instead" when calling update with args

So the user could just copy-paste the command.
2017-07-05 21:49:27 +03:00 · 2017-07-05 21:49:27 +03:00 · 156e19c6dc
commit 156e19c6dc
parent ec91c3f8e2
1 changed files with 1 additions and 1 deletions
--- a/Library/Homebrew/cmd/update.sh
+++ b/Library/Homebrew/cmd/update.sh
@ -336,7 +336,7 @@ homebrew-update() {
      *)
        odie <<EOS
 This command updates brew itself, and does not take formula names.
-Use 'brew upgrade <formula>'.
+Use 'brew upgrade $@' instead.
 EOS
        ;;
    esac