There's a river starting on line two "sentences." through the period in "habit." and down through the space to the right of "set" 'anymore." and "practice."
Your browser most likely took this into account when doing the text layout. HTML & CSS don't specify algorithms for line-breaking, which the person who wrote that may not have realised.
In order to demonstrate the problem reliably, they would have had to use an image or PDF file. But the fact that your browser fixed it (as did mine) indicates that it's not actually a problem, since it can be solved automatically in software.
Some issues can be solved automatically in software, but that's like saying a sufficiently smart compiler can produce optimal machine code. It's true, but such software doesn't actually exist. There is still a lot of manual adjustment that goes on, especially in magazine layout, around headline kerning and text spacing issues to tweak the output from the algorithms.
(http://imgur.com/7zGhP9X)