Automattic/_s — pull request #527 by kovshenin (2014-06-26 07:51:01+00:00)
Title: Add a non-breaking space to _s_post_nav()

Sometimes the title length of a previous or next post would cause the arrow (larr/rarr) in the link to be wrapped to the next line. Adding a non-breaking space between the title and the arrow will stick it to the last word in the title.