:: String -> Int is:exact -package:gpolyline -package:numeric-prelude -package:ghc-boot -package:string-conversions -package:ViennaRNAParser -package:hxt -package:filepath -package:dbus -package:hledger-lib -package:bytestring package:vty
Returns the display width of a string. Assumes all characters with
unknown widths are 0 width.