master updated (ce04647d4d -> 9df5e30800)

[Lars Ingebrigtsen]

larsi pushed a change to branch master.

      from  ce04647d4d Revert "Remove PROBLEMS section on double-buffering"
       new  7d6fa01ab8 ; * lisp/eshell/esh-io.el (grep-null-device): Remove 
unused defvar.
       new  76b91671a1 Improve docstrings for 'eshell-exec-lisp' and functions 
that call it
       new  76429f4d17 Ensure 'eshell-output-object' always returns nil for 
consistency
       new  9df5e30800 Send SIGPIPE to external Eshell processes if their 
output target closes


Summary of changes:
 lisp/eshell/esh-cmd.el                   | 47 ++++++++++++++++++++------------
 lisp/eshell/esh-io.el                    | 31 +++++++++++++--------
 lisp/eshell/esh-proc.el                  | 31 ++++++++++++++++++---
 test/lisp/eshell/esh-proc-tests.el       | 45 ++++++++++++++++++++++++++++++
 test/lisp/eshell/eshell-tests-helpers.el |  9 ++++--
 5 files changed, 127 insertions(+), 36 deletions(-)
 create mode 100644 test/lisp/eshell/esh-proc-tests.el