Add more conversions from giac II

[mforets]

Ticket #22706 was about adding special function conversions for the Giac interface.

In this ticket we add two more conversions: ln and euler_gamma.

CC: @frederichan-IMJPRG @slel @tscrim

Component: interfaces

Keywords: giac, special functions

Author: Marcelo Forets

Branch/Commit: 415a5ed

Reviewer: Frédéric Chapoton, Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/23313

[mforets]

Branch: u/mforets/23313

[mforets]

Commit: 3b770da

[mforets]

New commits:

3b770da

add two giac conversions

[slel]

Description changed:

--- 
+++ 
@@ -1 +1,3 @@
-In #22706 was about adding special function `conversions` for the Giac interface, and here we add some more. 
+Ticket #22706 was about adding special function `conversions` for the Giac interface.
+
+In this ticket we add two more conversions: `ln` and `euler_gamma`.

[slel]

comment:2

mforets, is this ready for review? Don't forget to set to needs_review.

[mforets]

comment:4

Hi slelievre,
thanks for the reminder. Yes I think it is ready, I just set it for review.

I have not been updating my tickets from sagetrac for a while now; i don't have much extra time this year.

Best, Marcelo.-

[mforets]

Author: Marcelo Forets

[fchapoton]

comment:6

some failing doctests, see patchbot report