progress on clean up file/paragraph

src/file/paragraph/run/tab.ts

@@ -1,5 +1,11 @@
 import { XmlComponent } from "file/xml-components";
 
+// <xsd:group name="EG_RunInnerContent">
+//     ...
+//     <xsd:element name="tab" type="CT_Empty" minOccurs="0"/>
+//
+// TODO: this is unused and undocumented currently.
+// I think the intended use was for users to import, and insert as a child of `Run`.
 export class Tab extends XmlComponent {
     constructor() {
         super("w:tab");