docs: correct claim about Krackhardt's kite being the smallest network

where the most central actors are different according to classic centralities

fixes #32

Author: szhorvat

R/kite.R

@@ -2,12 +2,10 @@
 #'
 #' @description
 #'
-#'   Krackhardt's kite is a fictionary social network with ten actors.
-#'   It is the smallest graph for which the most central actor is different
-#'   according to the three classic centality measures: degree, closeness
-#'   and betweenness.
-#'
-#'
+#'   Krackhardt's kite is a fictional social network with ten actors.
+#'   It is a small (though not the smallest possible) graph for which the most
+#'   central actors are different according to the three classic centrality
+#'   measures: degree, closeness and betweenness.
 #'
 #' @name kite
 #' @docType data
@@ -20,7 +18,7 @@
 #' @references
 #'   Assessing the Political Landscape: Structure, Cognition, and Power in
 #'   Organizations. David Krackhardt. *Admin. Sci. Quart.* 35, 342-369,
-#'   1990.
+#'   1990. \doi{10.2307/2393394}
 #' @source
 #'   <http://www.orgnet.com/sna.html>
 #' @keywords datasets