A new vignette (vignette("regular-expressions")) describes the
details of the regular expressions supported by stringr.
The main vignette (vignette("stringr")) has been updated to
give a high-level overview of the package.
Minor improvements and bug fixes
str_order() and str_sort() gain explicit numeric argument for sorting
mixed numbers and strings.
str_replace_all() now throws an error if replacement is not a character
vector. If replacement is NA_character_ it replaces the complete string
with replaces with NA (#124).
All functions that take a locale (e.g. str_to_lower() and str_sort())
default to "en" (English) to ensure that the default is consistent across