gnu: Remove ‘open source’ from package descriptions.

Also do some (trivial) editing where appropriate.

* gnu/packages/bioconductor.scm (r-anaquin, r-rcppnumerical)
[description]: Remove superfluous ‘open source’.
* gnu/packages/debian.scm (apt-mirror)[description]: Likewise.
Add @acronym{}.  Drop obscure Ubuntu for famous Trisquel.  Reorder.
* gnu/packages/documentation.scm (scrollkeeper)[description]:
Remove superfluous ‘open systems’.  Keep ‘Open Source’ in standard name.
* gnu/packages/engineering.scm (freecad, cura-engine)[description]:
Remove superfluous ‘open source’ and excessive puffery.
* gnu/packages/firmware.scm (make-opensbi-package)
[synopsis]: Remove ‘Open Source’.  Use @acronym{}.
[description]: Fix first sentence to follow guidelines.  Use @acronym{}.
* gnu/packages/game-development.scm (ioquake3, recastnavigation):
[description]: Remove ‘open source’.
* gnu/packages/graphics.scm (skia)[description]: Likewise.
* gnu/packages/lisp-xyz.scm (sbcl-s-sysdeps)[description]: Likewise.
* gnu/packages/machine-learning.scm (onnx)[description]: Likewise.
Use @acronym{}.
* gnu/packages/ocaml.scm (ocaml-cudf)[description]: Likewise.

1 files changed, 2 insertions, 5 deletions

diff --git a/gnu/packages/game-development.scm b/gnu/packages/game-development.scm
index 7f05d8ed06..7b2fb8dac3 100644
--- a/gnu/packages/game-development.scm
+++ b/gnu/packages/game-development.scm
@@ -2187,9 +2187,8 @@ of the others")
       (description "ioquake3 is a free software first person shooter engine
 based on the Quake 3: Arena and Quake 3: Team Arena source code.  Compared to
 the original, ioquake3 has been cleaned up, bugs have been fixed and features
-added.  The permanent goal is to create the open source Quake 3 distribution
-upon which people base their games, ports to new platforms, and other
-projects.")
+added.  The permanent goal is to create a Quake 3 distribution upon which
+people base their games, ports to new platforms, and other projects.")
       (license license:gpl2))))
 
 (define-public instead
@@ -2806,8 +2805,6 @@ construction toolset for games.
 @item It is automatic, which means that you can throw any level geometry
       at it and you will get robust mesh out.
 @item It is fast which means swift turnaround times for level designers.
-@item It is open source so it comes with full source and you can
-      customize it to your heart's content.
 @end itemize
 
 The Recast process starts with constructing a voxel mold from a level