Fix Period Problem With Long Footnotes

Just to give an example of a workaround I had to create for one note was to change my text from

* The most detailed sources about Stevenson are {MacDonald, 1989 #350} and {Scott-Sutherland, 2005 #330}

to:

* The most detailed source about Stevenson is {Scott-Sutherland, 2005 #330} See also {MacDonald, 1989 #350}

Otherwise my note would read (see the superfluous period after “1989”):

The most detailed sources about Stevenson are Malcolm MacDonald, Ronald Stevenson: A Musical Biography, NLS Themes of Scotland (Edinburgh: National Library of Scotland, 1989). and Colin Scott-Sutherland, Ronald Stevenson: The man and his music — A symposium (London: Toccata Press, 2005).

I agree that the change is rather minor, but having to modify the content of a given text to account for the idiosyncrasies of a piece of software is not acceptable.