[Rd] Typos in TclInterface.Rd (PR#9436)

[Stephen Eglen]

 > If you are going to impose the cost on the developers of a bug report on 
 > typos, please at least do as we _do_ ask and check the current version, in 
 > your case at
 > 
 > https://svn.r-project.org/R/trunk/src/library/tcltk/man/TclInterface.Rd
 > 
 > You will I believe want to update your bug report.

Thanks, this one still remains (other two already fixed).

 > > line 192: SIDE
 > >  \code{tclvalue} function, which can also occur on the left SIE of

Stephen