Document the new 'number' attribute and paragraph numbering.

jyasskin · jyasskin · commit cf11ada3c9cf · 2015-06-06T15:20:48.000-07:00
diff --git a/section.html b/section.html
@@ -14,7 +14,12 @@
 -->
 
 <!--
-    Recognizes attributes 'id' and 'title', but marking these as attributes
+    Sections auto-number themselves and their paragraphs. The chosen number can
+    be overridden by setting the 'number' attribute. A paragraph can also be
+    marked as a continuation of the previous paragraph (without its own number)
+    by giving it a 'cont' class.
+
+    Also recognizes attributes 'id' and 'title', but marking these as attributes
     cause problems for the ShadowDOM polyfill.
 -->
 <polymer-element name="cxx-section" constructor="CxxSectionElement" attributes="number">
