[Rd] documentation for legend(): possible missing info for pch.

[Laurent Gautier]

In the documentation for graphics::legend(), the entry for "pch" is:

 >      pch: the plotting symbols appearing in the legend, either as
           vector of 1-character strings, or one (multi character)
           string.  _Must_ be specified for symbol drawing.


If I did not misread them, examples in the same documentation page 
suggest that it is also possible to pass integers.


Best,


Laurent