Update leviathan.csl (#7359)

https://forums.zotero.org/discussion/120401/leviathan-deutsch

leviathan.csl

@@ -23,7 +23,7 @@
     <issn>0340-0425</issn>
     <eissn>1861-8588</eissn>
     <summary>Style for Leviathan. Berliner Zeitschrift für Sozialwissenschaft. - The URL is at the moment only shown for articles in magazines and newspapers. - If you need only references to a webpage but no entry in the bibliography, maybe just use the export function or do this manually.</summary>
-    <updated>2024-03-13T09:07:00+00:00</updated>
+    <updated>2024-12-17T09:57:26+00:00</updated>
     <rights license="http://creativecommons.org/licenses/by-sa/3.0/">This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 License</rights>
   </info>
   <locale xml:lang="de">
@@ -35,8 +35,14 @@
       <term name="close-quote">«</term>
       <term name="open-inner-quote">›</term>
       <term name="close-inner-quote">‹</term>
+      <term name="no date">o. J. </term>
     </terms>
   </locale>
+  <macro name="original-date">
+    <date form="text" variable="original-date">
+      <date-part name="year"/>
+    </date>
+  </macro>
   <macro name="contributors-long">
     <names variable="author">
       <name delimiter="; " delimiter-precedes-last="never"/>
@@ -78,14 +84,18 @@
     </choose>
   </macro>
   <macro name="date">
-    <group delimiter=" ">
-      <date variable="issued">
-        <date-part name="year"/>
-      </date>
-      <date form="text" variable="original-date" prefix="[" suffix="]">
-        <date-part name="year"/>
-      </date>
-    </group>
+    <choose>
+      <if variable="issued">
+        <date variable="issued">
+          <date-part name="year"/>
+        </date>
+        <text variable="year-suffix"/>
+      </if>
+      <else-if match="none" variable="issued">
+        <text term="no date"/>
+        <text variable="year-suffix"/>
+      </else-if>
+    </choose>
   </macro>
   <macro name="container-article">
     <group delimiter=" ">
@@ -138,6 +148,7 @@
             <group delimiter=" ">
               <text macro="contributors-short"/>
               <text macro="date"/>
+              <text macro="original-date" prefix=" [" suffix="]"/>
             </group>
             <text macro="citation-locator"/>
           </group>