failing doctest with optional tag octave

[seblabbe]

sage -t --optional=sage,octave src/doc/en/constructions/interface_issues.rst

gives

sage -t --random-seed=0 src/doc/en/constructions/interface_issues.rst
**********************************************************************
File "src/doc/en/constructions/interface_issues.rst", line 432, in doc.en.constructions.interface_issues
Failed example:
    octave("atanh(1.1)")   ## optional - octave
Expected:
    (1.52226,-1.5708)
Got:
     (1.52226,1.5708)
**********************************************************************

This is using:

$ octave --version
octave: X11 DISPLAY environment variable not set
octave: disabling GUI features
GNU Octave, version 4.2.2
Copyright (C) 2018 John W. Eaton and others.
This is free software; see the source code for copying conditions.
There is ABSOLUTELY NO WARRANTY; not even for MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.

Octave was configured for "x86_64-pc-linux-gnu".

Additional information about Octave is available at http://www.octave.org.

Please contribute if you find this software useful.
For more information, visit http://www.octave.org/get-involved.html

Read http://www.octave.org/bugs.html to learn how to submit bug reports.

indeed:

octave:1> atanh(1.1)
ans =  1.5223 + 1.5708i

Component: documentation

Author: Frédéric Chapoton

Branch/Commit: 8365222

Reviewer: Sébastien Labbé

Issue created by migration from https://trac.sagemath.org/ticket/30636

[fchapoton]

Commit: 8365222

[fchapoton]

comment:3

Voilà, voilà.

---

New commits:

8365222

trac 30636 fix octave doctest

[fchapoton]

Branch: u/chapoton/30636

[fchapoton]

Author: Frédéric Chapoton

[seblabbe]

Reviewer: Sébastien Labbé

[vbraun]

Changed branch from u/chapoton/30636 to 8365222