docs: Close the parenthesis in USairports, and fix "accoring"

R/USairports.R

@@ -34,7 +34,7 @@
 #'       domestic and international carriers that performed at least one
 #'       flight in December of 2010.}
 #'     \item{Departures}{The number of departures (for a given airline and
-#'       aircraft type.}
+#'       aircraft type).}
 #'     \item{Seats}{The total number of seats available on the flights
 #'       carried out by a given airline, using a given aircraft type.}
 #'     \item{Passengers}{The total number of passangers on the flights

R/yeast.R

@@ -50,7 +50,7 @@
 #'
 #'   Vertex attributes: \sQuote{name}, \sQuote{Description},
 #'   \sQuote{Class}, the last one contains the class of the protein,
-#'   accoring to the classification above.
+#'   according to the classification above.
 #'
 #'   Note that some proteins in the network did not appear in the
 #'   annotation files, the \sQuote{Class} and \sQuote{Description}