Promote tests following removal of autogen id for headings

Author: panglesd

test/compiler/multi-file.t/run.t

@@ -29,12 +29,12 @@ $ cp main.html /tmp/
   $ show_source main.html | grep -A 11 "class=\"slip-body"
   <div class="slip-body">
   <div>
-  <h1 id="a-title"><a class="anchor" aria-hidden="true" href="#a-title"></a><span>A title</span></h1>
-  <h2 id="chapter-1"><a class="anchor" aria-hidden="true" href="#chapter-1"></a><span>Chapter 1</span></h2>
+  <h1><span>A title</span></h1>
+  <h2><span>Chapter 1</span></h2>
   <div src=chapter1.md include>
   <p><span>Hello! How are you?</span></p>
   </div>
-  <h2 id="chapter-2" pause><a class="anchor" aria-hidden="true" href="#chapter-2"></a><span>Chapter 2</span></h2>
+  <h2 pause><span>Chapter 2</span></h2>
   <div pause src="chapter2/chapter2.md" include>
   <p><span>I am the chapter 2 </span><span pause></span><span> and I consist of two parts:</span></p>
   <h3><span>Part 1</span></h3>

test/compiler/simple.t/run.t

@@ -13,7 +13,7 @@ We can compile the file using the slip_of_mark binary
   <div class="slip">
   <div class="slip-body">
   <div>
-  <h1 id="a-title"><a class="anchor" aria-hidden="true" href="#a-title"></a><span>A title</span></h1>
+  <h1><span>A title</span></h1>
   <div pause></div>
   <p><span>A word </span><span id="id" emph-at-unpause step>and</span><span> some other words.</span></p>
   <div pause></div>
@@ -53,7 +53,7 @@ If we do not pass an input file, it gets its value from stdin
   <div class="slip">
   <div class="slip-body">
   <div>
-  <h1 id="title"><a class="anchor" aria-hidden="true" href="#title"></a><span>Title</span></h1>
+  <h1><span>Title</span></h1>
   <p><span>Paragraph</span></p>
 
 If we give neither the input nor the output, stdin and stdout are used: