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Finds the height and width of all the string in a character vector.
stringDims(string)vector of strings
a vector of the number of lines in each string.
a vector with the number of character columns in the longest line.
stringDims finds the number of characters in width and number of
lines in height for each string in the string argument.
# NOT RUN {
a <- c("this is a single line string", "This is a\nmulty line string")
stringDims(a)
# }
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