some more docs for attribute export and cleanup empty lines

src/node/utils/ExportHtml.js

@@ -168,6 +168,8 @@ function getHTMLFromAtext(pad, atext, authorColors)
       return false;
     }
 
+    // is called when an attribute is in ENTER or STAY state and saves
+    // a reference to it so it can be closed in order
     function emitOpenTag(i)
     {
       openTags.unshift(i);
@@ -184,6 +186,8 @@ function getHTMLFromAtext(pad, atext, authorColors)
       }
     }
 
+    // this closes an open tag and removes its reference from openTags
+    // it is not directly called but via orderdCloseTags
     function emitCloseTag(i)
     {
       openTags.shift();