Nothing
LaTeXcape <- function(x){
x <- gsub("$","\\$",x,fixed=TRUE)
x <- gsub("_","\\_",x,fixed=TRUE)
x <- gsub("^","\\^",x,fixed=TRUE)
}
checkLaTeXcape <- function(x,where){
do.warn <- any(grepl("$",x,fixed=TRUE))
do.warn <- do.warn || any(grepl("_",x,fixed=TRUE))
do.warn <- do.warn || any(grepl("^",x,fixed=TRUE))
if(do.warn)
warning("Unescaped TeX special in ",where)
}
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