vmstat -SM doesn't work but vmstat -S M does

Issue

• The vmstat program  does not use the standard getopt and, consequently, it does not work quite like a program should with regards to command line options.

• For example, note that the "S M" arguments given to vmstat will not work unless a space is inserted between them.  Applications should be able to specify the option
  and option-argument in the same argument string without intervening <blank> characters:

  #vmstat -SM 5
  -S requires k, K, m or M (default is kb)
  
  #vmstat -S M 5
  procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------
   r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa st
   0  0    230     21     72    234    0    0     4     5    6    0  5  1 94  0  0
   0  0    230     21     72    234    0    0     0     6 1059  802  1  0 99  0  0