Make the examples work even better on phones / small width.

whatsnew.htm

@@ -18,7 +18,7 @@
     a[href]:hover { color: var(--link-hover-fg-color); text-decoration: underline }
     tt, pre      { font: calc(13rem/16)/calc(21rem/16) monospace; color: inherit; background-color: var(--code-bg-color) }
     tt           { padding: 2px 4px; border-radius: 4px }
-    pre          { line-height: normal; padding: 10px; border-radius: 6px }
+    pre          { line-height: normal; padding: 10px; border-radius: 6px; overflow-x: auto }
     li, div.limargins { margin-block: calc(5rem/16) }
     div.bluehead { text-align: center; color: white; background-color: hsl(206, 100%, 30%); padding: 5px; font-weight: bold; line-height: normal }
     .date        { font-size: calc(11rem/16); font-weight: bold }