plot for [i=...] fails to work

[Mojca M. <moj...@gm...>]

Hello,

I have an one-year old document using lines similar to
     plot for [i=1:10] i
which apparently worked, but now it doesn't seem to work any more:

gnuplot> plot for [i=1:10] i
                    ^
         ':' expected

on gnuplot 4.2 patchlevel 2. Did the syntax change, am I using a wrong
verison of gnuplot or am I misinterpreting something?

Thanks a lot,
    Mojca