Word Language

  [Glob]          ysh-glob         *.py
  [Joining]       ysh-word-join    --flag='value'  PATH="value"
  [Quotes]        ysh-string       "x is $x"  $"x is $x"  r'[a-z]\n'
                                   u'line\n'  b'byte \yff'
                  triple-quoted    """  $"""  r'''  u'''  b'''
                X tagged-str       "<span id=$x>"html
  [Substitutions] expr-sub         echo $[42 + a[i]]
                  expr-splice      echo @[split(x)]
                  var-splice       @myarray @ARGV
                  command-sub      $(date)
                  command-splice   @(cat my-j8-lines.txt)
  [Formatting]  X ysh-printf       ${x %.3f}
                X ysh-format       ${x|html}
