Corrected spelling of Jaro-Winkler (#87)

Author: bzki

pkg/R/doc_metrics.R

@@ -39,7 +39,7 @@
 #' \code{qgram} \tab \eqn{q}-gram distance. \cr
 #' \code{cosine} \tab cosine distance between \eqn{q}-gram profiles \cr
 #' \code{jaccard} \tab Jaccard distance between \eqn{q}-gram profiles \cr
-#' \code{jw} \tab Jaro, or Jaro-Winker distance.\cr
+#' \code{jw} \tab Jaro, or Jaro-Winkler distance.\cr
 #' \code{soundex} \tab Distance based on soundex encoding (see below)
 #' }
 #'