fix doctest failure in doc/en/constructions/plotting.rst due to upgrade to Maxima 5.19.1

[sagetrac-drkirkby]

On Solaris 10 update 7 (SPARC), the following test failed. Both ECL and Maxima were updated - ECL version 9.8.4, Maxima version 5.19.1. Sage was built with gcc 4.4.1

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| Sage Version 4.1.1, Release Date: 2009-08-14                       |
| Type notebook() for the GUI, and license() for information.        |
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Thu Aug 20 20:02:37 BST 2009
dsage-trial tmp directory doesn't exist - creating ...
This script will run the unit tests for DSage

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File "/export/home/drkirkby/sage/sage-4.1.1/devel/sage/doc/en/constructions/plotting.rst", line 209:
    sage: maxima.eval('load("plotdf");')
Expected:
    '".../local/share/maxima/5.16.3/share/dynamics/plotdf.lisp"'
Got:
    '"/export/home/drkirkby/sage/sage-4.1.1/local/share/maxima/5.19.1/share/dynamics/plotdf.lisp"'
**********************************************************************
1 items had failures:
   1 of   3 in __main__.example_11
***Test Failed*** 1 failures.
For whitespace errors, see the file /export/home/drkirkby/sage/sage-4.1.1/tmp/.doctest_plotting.py

Component: graphics

Keywords: maxima

Issue created by migration from https://trac.sagemath.org/ticket/6785

[aghitza]

comment:2

Trivial: the Maxima version changed. See attached patch.

[aghitza]

Changed keywords from none to maxima

[aghitza]

Attachment: trac_6785.patch.gz

apply after the spkg's at #6564 and #6699

[sagetrac-mvngu]

comment:5

This is fixed by #6699.