Fix spelling error in the Statistics::R pod

Index: libstatistics-r-perl/lib/Statistics/R.pm
===================================================================
--- libstatistics-r-perl.orig/lib/Statistics/R.pm	2011-11-03 17:32:05.000000000 -0700
+++ libstatistics-r-perl/lib/Statistics/R.pm	2011-11-11 20:02:31.000000000 -0800
@@ -106,7 +106,7 @@
 
    my $out = $R->run( q`print( 1 + 2 )` );
 
-If you intend on runnning many R commands, it may be convenient to pass an array
+If you intend on running many R commands, it may be convenient to pass an array
 of commands or put multiple commands in an here-doc:
 
    # Array of R commands: