man list meta

list(n)                      Tcl Built-In Commands                     list(n)

______________________________________________________________________________

NAME
       list - Create a list

SYNOPSIS
       list ?arg arg ...?
_________________________________________________________________

DESCRIPTION
       This  command  returns  a  list  comprised of all the args, or an empty
       string if no args are specified.  Braces and backslashes get  added  as
       necessary,  so  that the index command may be used on the result to re-
       extract the original arguments, and also so that eval may  be  used  to
       execute the resulting list, with arg1 comprising the command's name and
       the other args comprising its arguments.  List produces  slightly  dif-
       ferent  results  than concat:  concat removes one level of grouping be-
       fore forming the list, while list works directly from the original  ar-
       guments.  For example, the command
              list a b {c d e} {f {g h}}
       will return
              a b {c d e} {f {g h}}
       while concat with the same arguments will return
              a b c d e f {g h}

KEYWORDS
       element, list

Tcl                                                                    list(n)