msh: renames: ->words => ->op_words, space() => get_space()

msh: renames: ->words => ->op_words, space() => get_space()
msh: simplify glob0/glob1/glob2/glob3

get_space                                              -      26     +26
glob3                                                 35      34      -1
glob2                                                 28      27      -1
strsave                                               55      53      -2
globv                                                  4       -      -4
func                                                   4       -      -4
xstrcmp                                               25      12     -13
dodot                                                178     164     -14
rexecve                                              272     257     -15
space                                                 26       -     -26
glob1                                                292     256     -36
expand                                              2246    2209     -37
------------------------------------------------------------------------------
(add/remove: 1/3 grow/shrink: 0/8 up/down: 26/-153)          Total: -127 bytes