Make test work with upstream cbehave
(tinydir bundles a modified version)

diff --git a/tests/file_open_test.c b/tests/file_open_test.c
index 09b856e..92b13ca 100644
--- a/tests/file_open_test.c
+++ b/tests/file_open_test.c
@@ -4,6 +4,11 @@
 #include "cbehave.h"
 #include "util.h"
 
+#define ASSERT(cond, ret) \
+if (!(cond)) {\
+    cbehave_feature_return(__FILE__, __LINE__, ret, _state); \
+    goto _feature_over; \
+}\
 
 FEATURE(file_open, "File open")
 	SCENARIO("Open file in current directory")
@@ -34,4 +39,7 @@ FEATURE(file_open, "File open")
 	SCENARIO_END
 FEATURE_END
 
-CBEHAVE_RUN("File open:", TEST_FEATURE(file_open))
+int main(void) {
+	cbehave_feature _cfeatures[] = {{feature_idx(file_open)}};
+	return cbehave_runner("File open:", _cfeatures);
+}
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<div class='path'>path: <a href='/guix/log/?id=cca544513b7c01e1cff33ac0c690031406dceac6'>root</a>/<a href='/guix/log/tests?id=cca544513b7c01e1cff33ac0c690031406dceac6'>tests</a>/<a href='/guix/log/tests/pki.scm?id=cca544513b7c01e1cff33ac0c690031406dceac6'>pki.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/tests/pki.scm?id=cca544513b7c01e1cff33ac0c690031406dceac6&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-12-12 15:03:05 +0100'>2022-12-12</span></td><td><a href='/guix/commit/tests/pki.scm?id=3677b97030e5954fa26bdb435e0d3379a1a4ec43'>pki: 'public-keys-&gt;acl' deduplicates entries.</a><span class='msg-avail'>...<span class='msg-tooltip'>Reported by Tobias Geerinckx-Rice &lt;me@tobias.gr&gt;
in &lt;https://issues.guix.gnu.org/50892&gt;.

* guix/pki.scm (public-keys-&gt;acl): Add call to 'delete-duplicates'.
* tests/pki.scm ("public-keys-&gt;acl deduplication"): New test.
</span></span></td><td>Ludovic Courtès</td></tr>