Nothing
## trimws was added in R 2.3.0. If we're using a previous version of
## R we need to define it.
if(!exists('trimws', mode='function'))
trimws <- function(s)
{
s <- sub(pattern="^[[:blank:]]+", replacement="", x=s)
s <- sub(pattern="[[:blank:]]+$", replacement="", x=s)
s
}
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