[elpa] externals/ess updated (2a8c385d20 -> 71b0e364a1)

[ELPA Syncer]

elpasync pushed a change to branch externals/ess.

      from  2a8c385d20 Don't enable enriched `ess-command` too early
       new  be4bf810e1 Extract `ess--command-error-handler` from `ess-command`
       new  71b0e364a1 Ask user to disable background evaluations in case of 
interrupt


Summary of changes:
 doc/newfeat.texi |   5 +++
 lisp/ess-inf.el  | 116 ++++++++++++++++++++++++++++++++-----------------------
 2 files changed, 72 insertions(+), 49 deletions(-)