mdscrub: residual html, control characters, headings, page markers

parity/cases/mdscrub/headings.md

@@ -0,0 +1,11 @@
+# [I. The Setting](#ch1) {.unnumbered}
+
+## [The Quarrel]{.chapter-title}
+
+### **THE SETTLEMENT**
+
+#### <span class="head">A   Spaced   Heading</span>
+
+#not a heading
+
+Body text follows, and is left alone apart from its tags.