Update tests for pandoc 2.10

Author: tarleb

cito/expected.md

@@ -3,7 +3,7 @@ cito_cites:
   cites_as_evidence:
   - Li95
   cites_as_recommended_reading:
-  - Upper\_writers\_1974
+  - Upper_writers_1974
 ---
 
 Abstract

track-changes/expected_draft.html

@@ -12,6 +12,7 @@
     div.column{display: inline-block; vertical-align: top; width: 50%;}
     div.hanging-indent{margin-left: 1.5em; text-indent: -1.5em;}
     ul.task-list{list-style: none;}
+    .display.math{display: block; text-align: center; margin: 0.5rem auto;}
   </style>
   <!--[if lt IE 9]>
     <script src="//cdnjs.cloudflare.com/ajax/libs/html5shiv/3.7.3/html5shiv-printshiv.min.js"></script>