gettext related bug in _ (history)

[sagetrac-logix]

In versions of Sage up to 4.3.2, the following worked as expected:

>./sage
----------------------------------------------------------------------
| Sage Version 4.3.2, Release Date: 2010-02-06                       |
| Type notebook() for the GUI, and license() for information.        |
----------------------------------------------------------------------
sage: _?
[...]
sage: _
''
sage: _
''

However, with Sage 4.3.3, it has stopped working:

----------------------------------------------------------------------
| Sage Version 4.3.3, Release Date: 2010-02-21                       |
| Type notebook() for the GUI, and license() for information.        |
----------------------------------------------------------------------
sage: _?
[...]
sage: _
''
sage: _
<bound method NullTranslations.ugettext of <gettext.NullTranslations instance at 0x4b1a680>>

For some things, the history works as expected, but for others it does not. To me it appears that it is "simple" things, e.g. above, the empty expression, or simple expressions like "3+4" where it does not work anymore, but for more complex things (e.g. if you call a function that returns something), "_" still does what you would expect it to do.

This bug still exists in Sage 4.3.5.

CC: @williamstein @TimDumol

Component: notebook

Keywords: gettext history documentation

Author: Mike Hansen

Reviewer: Tim Dumol

Merged: SageNB 0.8.1

Issue created by migration from https://trac.sagemath.org/ticket/8686

[sagetrac-logix]

Changed author from Harold Gutch to none

[mwhansen]

Author: Mike Hansen

[mwhansen]

comment:2

Attachment: trac_8686.patch.gz

[TimDumol]

comment:4

Nice debugging. Works as advertised.

[loefflerd]

Reviewer: Tim Dumol

[TimDumol]

Merged: SageNB 0.8.1