[Bug 267347] vmstat -w requires interval, which is in contrary to vmstat(8) manual

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=267347

            Bug ID: 267347
           Summary: vmstat -w requires interval, which is in contrary to
                    vmstat(8) manual
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: misc
          Assignee: bugs@FreeBSD.org
          Reporter: pkubaj@FreeBSD.org

vmstat(8) states:
     -w      Pause wait seconds between each display.  If no repeat wait
             interval is specified, the default is 1 second.  The vmstat
             command will accept and honor a non-integer number of seconds.

However, not passing the interval and using only vmstat -w prints:
root@talos-powerpc64:~ # vmstat -w
vmstat: option requires an argument -- w
usage: vmstat [-afHhimoPsz] [-M core [-N system]] [-c count] [-n devs]
              [-p type,if,pass] [-w wait] [disks] [wait [count]]

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