Update stylesheet with latest output along with demo page.

github-markdown.css

@@ -133,10 +133,6 @@
   color: #032f62;
 }
 
-.markdown-body .placeholder-box {
-  border: 1px solid #959da5;
-}
-
 .markdown-body a {
   background-color: transparent;
 }
@@ -672,11 +668,6 @@
   color: #444d56;
 }
 
-.markdown-body .full-commit .btn-outline:not(:disabled):hover {
-  color: #005cc5;
-  border-color: #005cc5;
-}
-
 .markdown-body .blob-wrapper {
   overflow-x: auto;
   overflow-y: hidden;
@@ -757,8 +748,39 @@
   border-color: #0366d6;
 }
 
-.markdown-body .new-label-color-input:invalid {
-  color: #cb2431;
+.markdown-body .tab-size[data-tab-size="1"] {
+  -moz-tab-size: 1;
+  tab-size: 1;
+}
+
+.markdown-body .tab-size[data-tab-size="2"] {
+  -moz-tab-size: 2;
+  tab-size: 2;
+}
+
+.markdown-body .tab-size[data-tab-size="3"] {
+  -moz-tab-size: 3;
+  tab-size: 3;
+}
+
+.markdown-body .tab-size[data-tab-size="4"] {
+  -moz-tab-size: 4;
+  tab-size: 4;
+}
+
+.markdown-body .tab-size[data-tab-size="5"] {
+  -moz-tab-size: 5;
+  tab-size: 5;
+}
+
+.markdown-body .tab-size[data-tab-size="6"] {
+  -moz-tab-size: 6;
+  tab-size: 6;
+}
+
+.markdown-body .tab-size[data-tab-size="7"] {
+  -moz-tab-size: 7;
+  tab-size: 7;
 }
 
 .markdown-body .tab-size[data-tab-size="8"] {
@@ -766,6 +788,26 @@
   tab-size: 8;
 }
 
+.markdown-body .tab-size[data-tab-size="9"] {
+  -moz-tab-size: 9;
+  tab-size: 9;
+}
+
+.markdown-body .tab-size[data-tab-size="10"] {
+  -moz-tab-size: 10;
+  tab-size: 10;
+}
+
+.markdown-body .tab-size[data-tab-size="11"] {
+  -moz-tab-size: 11;
+  tab-size: 11;
+}
+
+.markdown-body .tab-size[data-tab-size="12"] {
+  -moz-tab-size: 12;
+  tab-size: 12;
+}
+
 .markdown-body .task-list-item {
   list-style-type: none;
 }