master updated (5af5ed6c62 -> f07505d1ec)

[Jim Porter]

jporter pushed a change to branch master.

      from  5af5ed6c62 Add basic test coverage for overlay modification hooks
       new  1be925faa1 Simplify Eshell handle functions and add 
tests/documentation
       new  3d6c013a27 Allow checking specific Eshell handles for interactive 
output
       new  ab7e94fb1d Add support for more kinds of redirect operators in 
Eshell
       new  a87c7aff55 Put Eshell's bookkeeping data for external processes on 
the process object
       new  f07505d1ec Let external Eshell processes send stdout and stderr to 
different places


Summary of changes:
 doc/misc/eshell.texi                     | 203 +++++++++++++++++----
 etc/NEWS                                 |  11 ++
 lisp/eshell/em-term.el                   |   2 +-
 lisp/eshell/esh-arg.el                   |  27 ++-
 lisp/eshell/esh-cmd.el                   |   4 -
 lisp/eshell/esh-io.el                    | 216 ++++++++++++++++-------
 lisp/eshell/esh-proc.el                  | 169 ++++++++++--------
 test/lisp/eshell/esh-cmd-tests.el        |  19 ++
 test/lisp/eshell/esh-io-tests.el         | 292 +++++++++++++++++++++++++++++++
 test/lisp/eshell/esh-proc-tests.el       | 125 +++++++++++--
 test/lisp/eshell/eshell-tests-helpers.el |  10 ++
 test/lisp/eshell/eshell-tests.el         |  19 --
 12 files changed, 890 insertions(+), 207 deletions(-)
 create mode 100644 test/lisp/eshell/esh-io-tests.el