add support for tablecontainer wrapper around table

Author: mojavelinux

src/css/doc.css

@@ -236,7 +236,15 @@
 .doc table.tableblock {
   background: var(--body-background);
   font-size: calc(15 / var(--rem-base) * 1rem);
-  margin: 1.5rem 0 0;
+}
+
+.doc > table.tableblock,
+.doc > table.tableblock + *,
+.doc .tablecontainer,
+.doc .tablecontainer + *,
+.doc :not(.tablecontainer) > table.tableblock,
+.doc :not(.tablecontainer) > table.tableblock + * {
+  margin-top: 1.5rem;
 }
 
 @media screen and (min-width: 1024px) {
@@ -256,10 +264,6 @@
   font-size: inherit;
 }
 
-.doc table.tableblock + * {
-  margin-top: 1.5rem;
-}
-
 .doc p.tableblock + p.tableblock {
   margin-top: 0.5rem;
 }