master updated (d3f1682ae9 -> 17bf6a829c)

[Jim Porter]

jporter pushed a change to branch master.

      from  d3f1682ae9 Handle make-directory return values in file name handlers
       new  54087e84df Add 'eshell-duplicate-handles' to return a copy of file 
handles
       new  6defbd65b6 Fix handling of output handles in nested Eshell forms
       new  17bf6a829c Simplify handling of /dev/null redirection in Eshell


Summary of changes:
 doc/misc/eshell.texi                 |   5 --
 lisp/eshell/esh-cmd.el               |  28 ++++----
 lisp/eshell/esh-io.el                | 121 ++++++++++++++++++++---------------
 test/lisp/eshell/em-extpipe-tests.el |   2 +-
 test/lisp/eshell/em-script-tests.el  |  32 +++++++--
 test/lisp/eshell/em-tramp-tests.el   |  75 ++++++++++++----------
 test/lisp/eshell/esh-io-tests.el     |  61 +++++++++++++++++-
 7 files changed, 213 insertions(+), 111 deletions(-)