'ls.scm' monkey-patches (ice-9 getopt-long) to allow it to recognize '-1'
as a valid option.  Unfortunately, monkey patching no longer works with
Guile 3.0 due to inlining, so change the test to make do without '-1'.

diff --git a/tests/core-utils.org b/tests/core-utils.org
index d35ede8..22718e3 100644
--- a/tests/core-utils.org
+++ b/tests/core-utils.org
@@ -93,14 +93,11 @@
 * ls
 :script:
 #+begin_src sh
-  ls -1 tests/data/star
+  ls tests/data/star
 #+end_src
 :stdout:
 #+begin_example
-  0
-  1
-  2
-  3
+  0  1  2  3                                                                    
 #+end_example
 
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<div class='path'>path: <a href='/guix/log/?id=1a8f7a0f584e5dd6e8f1a379b92f689b71902295&amp;showmsg=1'>root</a>/<a href='/guix/log/gnu?id=1a8f7a0f584e5dd6e8f1a379b92f689b71902295&amp;showmsg=1'>gnu</a>/<a href='/guix/log/gnu/tests?id=1a8f7a0f584e5dd6e8f1a379b92f689b71902295&amp;showmsg=1'>tests</a>/<a href='/guix/log/gnu/tests/singularity.scm?id=1a8f7a0f584e5dd6e8f1a379b92f689b71902295&amp;showmsg=1'>singularity.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/tests/singularity.scm?id=1a8f7a0f584e5dd6e8f1a379b92f689b71902295'>Collapse</a>)</th><th class='left'>Author</th></tr>
<tr class='logheader'><td><span title='2019-11-09 23:04:14 +0100'>2019-11-09</span></td><td class='logsubject'><a href='/guix/commit/gnu/tests/singularity.scm?id=f0034427f50be1bcab137d9877c3586e4be4d83e'>tests: Update references to the now-deprecated 'guile-json' variable.</a></td><td>Ludovic Courtès</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* gnu/tests/docker.scm (build-tarball&amp;run-docker-test): Refer to
'guile-json-3' instead of 'guile-json'.
* gnu/tests/singularity.scm (build-tarball&amp;run-singularity-test):
Likewise.


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