Eventually, the doc will be here:
http://www.purl.org/tcl/home/man/tcl8.5/TclCmd/lsearch.html

 lrepeat number element1 ?element2 element3 ...?

This command builds up a list by repeating elements.  It will be a part of
Tcl 8.5.0 .  Note that Tcl 8.5 is available in an early developer form from ftp://ftp.tcl.tk/pub/tcl/nightly-cvs/tcl-*gz .  Early access to Tk 8.5 is there as well.

An example of how it will work is

  lrepeat 3 a

 a a a
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[RS]: Note the possible confusion with [string repeat]'s syntax:
 % string repeat a 5
 aaaaa

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[FW]: The most minimalist way to implement this in straight Tcl would in fact be to use [string repeat]:

 proc lrepeat {number args} {string repeat "$args " $number}

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[Category Command]