remove trailing whitespace

Author: coke

doc/Type/IO.pod6

@@ -315,7 +315,7 @@ C<False>.
 
 Runs an external command without involving a shell and returns a Proc object.
 
-    run 'touch', '>foo.txt'; 
+    run 'touch', '>foo.txt';
 
     run Q:w{rm >foo.txt}; # Another way to use run, using word quoting for the
                           # arguments