leoniedu

#' Convertion to title case with lower case for some classes of words.
#'
#' In written Portuguese, when converting to title case, it is not usual
#' to keep in title case some words, like prepositions, conjunctions,
#' articles and some kinds of pronouns.  This functions locates those
#' cases and converts them to lower case. Based on gist ToTitleCasePT https://gist.github.com/jjesusfilho/454192db8356eb9c486a02698338221a by https://github.com/jjesusfilho
#'
#' @param string vector of characters to be converted to title case
#'     but with connector words (one-word prepositions and conjunctions)
#'     and articles (both definite and indefinite) and some pronouns