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#' lettercase
#'
#' Utilities for formatting strings according to common cases: upper case,
#' lower case, snake case, camel case, spine case, title case, sentence case etc.
#'
#' @details
#'
#' The \strong{lettercase} package provides utilities that help manage and
#' maintain string formats related to:
#'
#' \itemize{
#' \item capitalization
#' \item whitespace / word separating characters
#' \item special characters
#' \item acronyms
#' }
#'
#' Most often, the common convenience functions will be used. These are:
#' \itemize{
#' \item str_upper_case, str_uppercase, str_all_caps
#' \item str_lower_case, str_lowercase
#' \item str_cap_wordsloa
#'
#' }
#'
#' @references
#' \url{http://en.wikipedia.org/wiki/Letter_case}
#' \url{http://en.wikipedia.org/wiki/Capitalization}
#' \url{http://perldoc.perl.org/perlrecharclass.html}
#'
#' @name lettercase
#' @docType package
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