[ESS] Arrow in left margin

[Vitalie Spinu]

It's an indicator of the beginning of the last evaluation. It helps when
you eval a region from a script buffer and an error occurs in one of the
earlier lines. You can then quickly pinpoint the first error in *R*
buffer by searching for this arrow.

Error navigation in *R* buffer (M-g n, M-g p) works within the region
between this arrow and end of the buffer.

  Vitalie

 >>> Rich Shepard on Thu, 19 Jun 2014 10:01:48 -0700 (PDT) wrote:

 >   Running Slackware-14.1 with emacs-24.3 and ESS-13.09. What just showed up
 > a couple of days ago is an arrow (short horizontal line with vertical arrow
 > on the left end) in the left margin, before the R prompt. See the attached
 > screen shot. It's not there on each line, but seems to come and go.

 >   I'm curious what it signifies. If anyone knows, please share your
 > knowledge with me.

 > TIA,

 > Rich




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