https://issues.dlang.org/show_bug.cgi?id=19552

          Issue ID: 19552
           Summary: -transition is non-intuitive to use - the flag should
                    list options by default
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: dmd
          Assignee: nobody@puremagic.com
          Reporter: greeenify@gmail.com

> dmd -transition

Error: unrecognized switch '-transition'
       run 'dmd -man' to open browser on manual

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