CLI.rst: expand the 'cp -r' subdirectory example

diff --git a/docs/frontends/CLI.rst b/docs/frontends/CLI.rst
index 4becace1b2f336b787333598c06f7a4bbf3ce74b..e91632f579b5843e408c4228c88225ce0ddce3ed 100644 (file)
--- a/docs/frontends/CLI.rst
+++ b/docs/frontends/CLI.rst
@@ -451,7 +451,9 @@ Command Examples
  ``tahoe cp -r ~/my_dir/ tahoe:``
 
  This copies the folder ``~/my_dir/`` and all its children to the grid, creating
- the new folder ``tahoe:my_dir``.
+ the new folder ``tahoe:my_dir``. Note that the trailing slash is not required:
+ all source arguments which are directories will be copied into new
+ subdirectories of the target.
 
 ``tahoe unlink uploaded.txt``