CHG: fix bug that removes soft line breaks on pasting content

[Davien21]

Whenever I copy content from Ms word or some other text editor software, on pasting the content into Simditor, The format function removes soft line breaks and causes some words at the end to merge with each other. I've fixed that by simply updating the regex replace function to add the spaces on soft line breaks.

Here's a few screenshots: BEFORE the fix:

AFTER the fix: