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getOption('DEBUG')==TRUE
, write text to STDOUT and flush so
that the text is immediatly displayed. Otherwise, do nothing.
scat(...)
cat
cat
options(DEBUG=NULL) # makee sure DEBUG isn't set
scat("Not displayed")
options(DEBUG=TRUE)
scat("This will be displayed immediately (even in R BATCH output \n")
scat("files), provided options()$DEBUG is TRUE.")
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