[Rd] trivial typo in src/library/stats/man/ts.Rd

[Ben Bolker]

 "vector[s]" should be plural in line 54 ...

  cheers
   Ben Bolker

----

Index: ts.Rd
===================================================================
--- ts.Rd	(revision 75540)
+++ ts.Rd	(working copy)
@@ -54,7 +54,7 @@
 }
 \details{
   The function \code{ts} is used to create time-series objects.  These
-  are vector or matrices with class of \code{"ts"} (and additional
+  are vectors or matrices with class of \code{"ts"} (and additional
   attributes) which represent data which has been sampled at equispaced
   points in time.  In the matrix case, each column of the matrix
   \code{data} is assumed to contain a single (univariate) time series.