[R] bug in pictex() (package:grDevices)

[Sam Steingold]

running
     pictex()
     plot(1:11,(-5:5)^2, type='b', main="Simple_Example_Plot")
     dev.off()
(as in the pictex example, but with underscores instead of spaces).
the TeX file contains

\put {Simple_Example_Plot}  [lB] <0.00pt,0.00pt> at 124.00 275.33

the underscores have a special meaning in TeX, so they should be quoted
or converted to dashes.

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Sam Steingold (http://www.podval.org/~sds) on Fedora Core release 4 (Stentz)
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