Thanks for pointing it out, but, since it's sort of an edge case (the chances that a line that of non-justified text ending exactly at the end of the block, *and* the particular word being italicized are fairly small), I'm not sure anything will be done about it. (Then again, I'm just a volunteer here, and not anyone who makes these decisions.)
If you want to avoid it, since you use justified text, you could add a small amount of padding (just a couple of pixels) to the right side of the container.
Something to keep in mind, though, with justified text (as with anything on the web), what looks readable to you might render differently for other people viewing your site. They may change the size of the font in their browser, or they may use a different browser which renders the type slightly wider or narrower than your browser does.