Citations to books in palaeontology.csl (citation-style-language#3182)

Fixes book citations.

* Some code clean-up

Prefer delimiters & terms over affixes & values

palaeontology.csl

@@ -5,7 +5,7 @@
     <id>http://www.zotero.org/styles/palaeontology</id>
     <link href="http://www.zotero.org/styles/palaeontology" rel="self"/>
     <link href="http://www.zotero.org/styles/journal-of-vertebrate-paleontology" rel="template"/>
-    <link href="http://www.palass.org/modules.php?name=palaeo&amp;sec=publications&amp;page=193#26" rel="documentation"/>
+    <link href="https://www.palass.org/publications/authors/instructions-authors-2012" rel="documentation"/>
     <author>
       <name>Benjamin C. Moon</name>
       <email>benjamin.moon@bristol.ac.uk</email>
@@ -114,9 +114,9 @@
                   <text variable="collection-title" font-style="italic" text-case="title" suffix=". "/>
                   <choose>
                     <if is-numeric="volume">
-                      <group delimiter=" ">
-                        <text value="Vol. "/>
-                        <number variable="volume" suffix="."/>
+                      <group delimiter=" " suffix=".">
+                        <text term="volume" form="short" text-case="capitalize-first"/>
+                        <number variable="volume"/>
                       </group>
                     </if>
                     <else>
@@ -125,8 +125,10 @@
                   </choose>
                 </group>
               </group>
-              <text prefix=" " suffix=", " macro="publisher"/>
-              <text variable="page" suffix=" pp"/>
+              <group delimiter=", " prefix=" ">
+                <text macro="publisher"/>
+                <text variable="page" suffix=" pp"/>
+              </group>
             </group>
           </if>
           <else-if type="thesis" match="any">
@@ -142,14 +144,14 @@
             <text variable="title" suffix=". "/>
             <text variable="issue" suffix=". "/>
             <group>
-              <text value="In" font-style="italic" suffix=" "/>
+              <text term="in" text-case="capitalize-first" font-style="italic" suffix=" "/>
               <text macro="editor" suffix=" "/>
               <group>
                 <text variable="container-title" text-case="title" font-style="italic" suffix=", "/>
                 <choose>
                   <if is-numeric="volume">
-                    <group delimiter=" ">
-                      <text value="Vol. "/>
+                    <group delimiter=" " suffix=".">
+                      <text value="Vol."/>
                       <number variable="volume"/>
                     </group>
                   </if>
@@ -158,8 +160,8 @@
                   </else>
                 </choose>
               </group>
-              <group delimiter=" ">
-                <text prefix=" " suffix=", " macro="publisher"/>
+              <group prefix=" " delimiter=", ">
+                <text macro="publisher"/>
                 <text variable="page" suffix=" pp"/>
               </group>
             </group>