Docs tweaks. Linkify hashtags.

git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@4034 ed5197a5-7fde-0310-b194-c3ffbd925b24

apps/cory/docs/app.js

@@ -8,7 +8,7 @@ async function loadDocument(name) {
 <style>body { background: #ccc; }</style>`;
 	var md = utf8Decode(await getFile(name + '.md'));
 	if (!md) {
-		md = "File not found.";
+		md = `File not found: ${JSON.stringify(name)}.`;
 	}
 	var parsed = new commonmark.Parser().parse(md);
 	var html = new commonmark.HtmlRenderer().render(parsed);
@@ -22,7 +22,7 @@ async function main() {
 
 core.register('message', function(message) {
 	if (message.event == 'hashChange') {
-		loadDocument(message.hash.substring(1));
+		loadDocument((message.hash || '#index').substring(1));
 	}
 });