Backport commit 265a5d979 from Emacs

* doc/org.texi (dir): Change example to use a method.

Document remote file name syntax change
265a5d9791bf42da0bab7bdbef4352e8d734ef31
Michael Albinus
Thu Mar 16 16:23:07 2017 +0100

doc/org.texi

@@ -15938,7 +15938,7 @@ To evaluate the @samp{src} code block on a remote machine, supply a remote s
 directory name using @samp{Tramp} syntax.  For example:
 
 @example
-#+BEGIN_SRC R :file plot.png :dir /dand@@yakuba.princeton.edu:
+#+BEGIN_SRC R :file plot.png :dir /scp:dand@@yakuba.princeton.edu:
 plot(1:10, main=system("hostname", intern=TRUE))
 #+END_SRC
 @end example