minor documentation change suggestion

[Eric S Fraga <ucecesf@ucl.ac.uk>]

Carsten et al.,

As always with org-mode, it does more than I could expect!  I was
writing some code to create org mode files which would have links to
an external file.  I wanted to link to a specific line number in that
file so added "::NNN" (where NNN would be the line number) and thought
I would have to make some changes to org-mode to support this.  Well,
of course I didn't have to make any changes!  It's already there.

However, the documentation is behind as a result.  Can I suggest you
add a line, such as below?

--8<---------------cut here---------------start------------->8---
diff --git a/doc/org.texi b/doc/org.texi
index 10d26fa..408710a 100644
--- a/doc/org.texi
+++ b/doc/org.texi
@@ -2754,6 +2754,7 @@ file:/home/dominik/images/jupiter.jpg     @r{file, absolute path}
 /home/dominik/images/jupiter.jpg          @r{same as above}
 file:papers/last.pdf                      @r{file, relative path}
 ./papers/last.pdf                         @r{same as above}
+file:sometextfile::NNN                    @r{file with line number to jump to}
 file:projects.org                         @r{another Org file}
 file:projects.org::some words             @r{text search in Org file}
 file:projects.org::*task title            @r{heading search in Org file}
--8<---------------cut here---------------end--------------->8---

Thanks,
eric