Update plos.csl

Fix issues regarding [internet] and [preprint] for PLoS as per: citation-style-language#4138 (and pointed out again here: citation-style-language#4140 (comment))

Please check carefully if I did this correctly. :)

plos.csl

@@ -10,10 +10,13 @@
     <author>
       <name>Sebastian Karcher</name>
     </author>
+    <contributor>
+      <name>Patrick O'Brien</name>
+    </contributor>
     <category citation-format="numeric"/>
     <category field="science"/>
     <summary>Vancouver for PLoS Journals as of January 2015</summary>
-    <updated>2019-07-12T08:11:53+00:00</updated>
+    <updated>2019-09-27T08:33:01+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="en">
@@ -110,13 +113,20 @@
   </macro>
   <macro name="container-title">
     <choose>
-      <if type="article-journal article-magazine chapter paper-conference article-newspaper post-weblog webpage" match="any">
+      <if type="article-journal article-magazine chapter paper-conference article-newspaper post-weblog webpage post report" match="any">
         <group suffix="." delimiter=" ">
           <choose>
-            <if type="article-journal">
-              <text variable="container-title" form="short" strip-periods="true"/>
+            <if type="article-journal report" match="any">
+              <group delimiter=" ">
+                <text variable="container-title" form="short" strip-periods="true"/>
+                <choose>
+                  <if match="none" variable="volume page">
+                    <text value="Preprint" prefix="[" suffix="]"/>
+                  </if>
+                </choose>
+              </group>
             </if>
-            <else-if type="post-weblog webpage" match="any">
+            <else-if type="post-weblog webpage post" match="any">
               <group delimiter=" ">
                 <text term="in" text-case="capitalize-first" suffix=":"/>
                 <text variable="container-title"/>
@@ -134,7 +144,6 @@
         </group>
         <text macro="edition" prefix=" "/>
       </if>
-      <!--add event-name and event-place once they become available-->
       <else-if type="bill legislation" match="any">
         <group delimiter=", ">
           <group delimiter=". ">
@@ -164,21 +173,9 @@
   <macro name="title">
     <text variable="title"/>
     <choose>
-      <if type="article-journal article-magazine chapter paper-conference article-newspaper post-weblog webpage" match="none">
-        <choose>
-          <if variable="URL">
-            <text term="internet" prefix=" [" suffix="]" text-case="capitalize-first"/>
-          </if>
-        </choose>
+      <if type="book chapter" match="any">
         <text macro="edition" prefix=". "/>
       </if>
-      <else-if type="post-weblog webpage" match="any">
-        <choose>
-          <if variable="container-title" match="none">
-            <text term="internet" prefix=" [" suffix="]" text-case="capitalize-first"/>
-          </if>
-        </choose>
-      </else-if>
     </choose>
     <choose>
       <if type="song motion_picture" match="any">
@@ -202,9 +199,17 @@
   <macro name="date">
     <choose>
       <if type="article-journal" match="any">
-        <group suffix=";" delimiter=" ">
-          <date variable="issued" form="text" date-parts="year"/>
-        </group>
+        <choose>
+          <if match="none" variable="volume page">
+            <group delimiter=" " suffix=". ">
+              <date date-parts="year" form="text" variable="issued"/>
+              <text macro="accessed-date"/>
+            </group>
+          </if>
+          <else>
+            <date date-parts="year" form="text" variable="issued" suffix=";"/>
+          </else>
+        </choose>
       </if>
       <else-if type="article-magazine article-newspaper" match="any">
         <date variable="issued" form="text"/>