- upstream updated to 15.09
Changes and New Features in 15.09:
   * ESS[R]: The indentation logic has been refactored.  It should be
     faster, more consistent and more flexible.  There are three types
     of indentation settings, those starting with 'ess-offset-' give the
     actual offsets, those starting with 'ess-indent-' are control
     (commonly Boolean) variables, and those starting with 'ess-align-'
     are vertical alignment overrides which inhibit default offsets in
     specific situations.  See 'ess-style-alist' for detailed
     description of the new indentation system and provided default
     indentation styles.
   * ESS[R]: Deprecation of old indentation settings.  As a consequence
     of the indentation re-factoring 'ess-brace-imaginary-offset',
     'ess-expression-offset' and all delimiter-specific offsets are
     deprecated.  The settings for indentation of continued statements
     have been replaced by 'ess-offset-continuations'.  It can be set to
     either 'cascade' or 'straight' (the default).
     'ess-arg-function-offset' has been replaced by
     'ess-indent-from-lhs' and has been generalised to assignements.
     This setting now works with both statement blocks and expressions
     and only takes effect for offsets set to 'prev-call' and
     'open-delim' in order to produce a consistent indentation.
   * ESS: A test framework has been set up.
   * ESS[R]: A new RStudio style is provided to mimic as closely as
     possible R files indented via RStudio.  To reproduce the setup of
     some of the RStudio users, the RStudio- style with
     'ess-offset-arguments' set to 'prev-line' is also provided.  In
     addition, the new RRR+ style is equivalent to RRR except it indents
     blocks in function calls relatively to the opening delimiter.  This
     style does not try to save horizontal space and produces more

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