1 If a file in the srcdir is removed, exposing a file in the underlaydir,
2 ikiwiki will not notice the change and rebuild it until the file in the
3 underlaydir gets a mtime newer than the mtime the removed file had.
5 Relatedly, if there are two files with different extensions that build a
6 page with the same name, in a directory, ikiwiki will update the page
7 whenever either changes, using the changed one as the source. But if that
8 most recently changed one is removed, it won't rebuild the page using the
9 older one as the source.