Godlike editing speed: redirecting to /add_new if page does not exist

[reactorcoremeltdown]

Summary

Instead of showing a traceback error page, we can do something more useful: prompt a user to create a new page if it does not exist! Bonus: by using ?page= url parameter we can specify which page we are going to edit. See the example below.

Details

Before displaying a page, wikmd checks mtime of a file. If a file does not exist, it will throw a FileNotFound error. We can catch this error and do a redirect instead. More to that, we can pass a page name as an argument to the /add_new route and therefore put the path to a page right into a template.

Checks

• In case of new feature, add short overview in docs/<corresponding file>
• Tested changes

[Linbreux]

Hi @reactorcoremeltdown

Nice to keep getting handy updates from your part. This looks great, I think it would definitely be useful for some users!