update tableblock h2, sectionbody style

src/css/doc.css

@@ -301,6 +301,14 @@
   border: 0 solid var(--table-border-color);
 }
 
+.doc table.tableblock h2 {
+  margin: 0;
+}
+
+.doc table.tableblock h2 + .sectionbody {
+  padding: 0 1rem;
+}
+
 .doc table.grid-all > * > tr > * {
   border-width: 1px;
 }