Spaces between words on published site are bigger than spaces between words in editor for text highlighted on the screenshots and for other text too.
Websites are now published in the HTML 5 standard.
Within this feature
DOCTYPE was changed, that changed algorithm for calculation on height and width for end blocks on page.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
This is Plesk internal issue with ID #PPPM-887 that was fixed in Plesk 12.0.5.
Upgrade to the latest version of Plesk.