improve the "click to the left" aspect of the notebook

[williamstein]

Aha!  Great!

This reminds we that when I started using the notebook interface, it
took me an embarrassingly long time to discover what was meant by the
phrase
'click to the left for traceback'.  I found this message confusing
because there is nothing to the left to click on.  At first I thought
this was a strange way
of saying `left-click'.  Eventually I worked it out by accident.  I
suggest a more verbose message along the lines of
`for traceback, click in the blank area just to the left of this
line'.  Or put something to click on, maybe along the lines of the
brackets in
the mathematica notebook, which has a hierarchical grouping mechanism
whereby groups of cells can be hidden or expanded together.
(Of course maybe sage does too, and I just don't know about it!)

Cheers,

Peter

CC: @qed777

Component: notebook

Author: Tim Dumol

Reviewer: Adam Webb

Merged: sagenb-0.4.4

Issue created by migration from https://trac.sagemath.org/ticket/1466

[TimDumol]

Makes the traceback message: "click to the left of this block for traceback" instead.

[TimDumol]

comment:1

Attachment: trac_1466-click-to-the-left-verbose.patch.gz

In case anyone considers this confusing enough, this patch makes the error message slightly more verbose.

[maxthemouse]

comment:2

Seems to work as described and is a bit more clear to read. ~ Adam

[maxthemouse]

Reviewer: Adam Webb

[williamstein]

comment:4

merge into sagenb-0.4.4

[sagetrac-mvngu]

Merged: sagenb-0.4.4

[sagetrac-mvngu]

Author: Tim Dumol