Suppress trailing spaces in table paragraphs.

Doc/tools/sphinxext/static/basic.css

@@ -257,6 +257,10 @@ table.docutils td, table.docutils th {
     background-color: #eef;
 }
 
+table.docutils td p.last, table.docutils th p.last {
+    margin-bottom: 0;
+}
+
 table.field-list td, table.field-list th {
     border: 0 !important;
 }