[web-animations-1] Some minor fixups to help with publishing

Author: birtles

web-animations-1/Overview.bs

@@ -1,4 +1,4 @@
-<style type="text/css">
+<style>
 .informative-bg {
   margin: 1.5em 0 1em;
   padding: 1em;
@@ -72,7 +72,7 @@ div.switch > dl > dt:before {
 Title: Web Animations
 Status: ED
 Work Status: Refining
-Shortname: web-animations
+Shortname: web-animations-1
 TR: https://www.w3.org/TR/web-animations-1/
 ED: https://drafts.csswg.org/web-animations-1/
 Previous version: https://www.w3.org/TR/2016/WD-web-animations-1-20160913/
@@ -198,7 +198,7 @@ spec:css-backgrounds-3; type:property;
 <script type="text/x-mathjax-config">
   MathJax.Hub.Config({showMathMenu: false});
 </script>
-<script src="MathJax/MathJax.js?config=MML_SVG" type="text/javascript"></script>
+<script src="MathJax/MathJax.js?config=MML_SVG"></script>
 
 <h2 id="introduction">Introduction</h2>
 <div class='informative-bg'><em>This section is non-normative</em>
@@ -2992,8 +2992,8 @@ in each property's property definition table:
     from <var ignore>V<sub>a</sub></var> to <var ignore>V<sub>b</sub></var>
     at 50% (<var ignore>p=0.5</var>),
     i.e.
-    <div role="math" aria-describedby="math-string-interpolation" class="formula">
-      <math xmlns="https://www.w3.org/1998/Math/MathML">
+    <div role="math" class="formula">
+      <math xmlns="http://www.w3.org/1998/Math/MathML">
         <msub><mi>V</mi><mn>result</mn></msub><mo>=</mo>
         <mrow>
           <mfenced open="{" close="">