Fix styles for tips in ember-data docs, fix tables in markdown

Author: kategengler

app/styles/app.css

@@ -187,6 +187,30 @@ section.event {
   margin: var(--spacing-2);
 }
 
+/* Ember data uses styled elements in markdown blocks that conflict with the
+   default styles for blockquotes (because of ::before block that has an
+   absolutely positioned quote mark).
+ */
+blockquote[style]::before {
+  all: initial;
+}
+
+/* Styles for tables (from markdown)
+   Should probably be upstreamed to ember-styleguide
+ */
+table {
+  text-align: left;
+  border-collapse: collapse;
+}
+
+table tr {
+  border-bottom: 1px solid var(--color-gray-300);
+}
+
+table th, table td {
+  padding: var(--spacing-1);
+}
+
 @media (width >= 845px) {
   .es-header {
     padding: 0 var(--spacing-4);