Remove last point for subheadings

[yxyx-github]

If you have subheadings this script will also place a point after the last number, e.g. "1.2.1. Some Heading". This commit ensures that the last point after a subheading will be removed. Main headings are not affected.

[Drofseh]

This is just what I wanted! Thank you

[lpanebr]

Sorry for just seeing this now. I like the ending period. Please check the latest version as it received lots of fixes and features. Thanks!