Markdown: Corner case with number and fullstop

[uliska]

Reflow should avoid the following situation in Markdown:

This is a sentence ending with the number 17. If it is broken before the number Markdown will interpret it as an enumeration.

=>
This is a sentence ending with the number
17. If it is broken before the number Markdown
will interpret it as an enumeration.

=> Equivalent to:
This is a sentence ending with the number

1. If it is broken 

Required solution: If the first token after the inserted break would be a number with an appended dot the line should be broken one token earlier.

[daviwil]

This issue was moved to atom/atom#18023