The cat0 function is to cat what paste0 is to paste; it simply makes concatenating many strings without a separator easier.
cat0(..., sep = "")
The character vector(s) to print; passed to [cat].
The separator to pass to [cat], of course, `""` by default.
Nothing (invisible `NULL`, like [cat]).
# NOT RUN { cat0("The first variable is '", names(mtcars)[1], "'."); # }
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