Split by Header with duplicate headers results in content loss

[mcwatt77]

It looks like it must be overwriting itself such that the only content in the created file is from the last section with the given heading. But all the content is replaced by a link. Obviously, you're not expecting headings at the same level to be duplicated.

[thesamim]

• 1 for this.

Adding {{title}} as prefix results in literal {{title}} being prepended to file name.

If a file is about to be over-written, should have a warning.

[lynchjames]

Should be fixed in 1.8.2