Style Guides are a little behind the times?

Here’s a punctuation question that’s been bothering me ever since I started blogging.
I checked out The Elements of Style by William Strunk, and some online style pages. I did not find my issue addressed, although in part this is truly not a new question:


When should terminal punctuation go inside the HTML tag?


For example, here’s a word in italics, just before the period. I’m sure I’m right that the period itself should not be in italics. Here’s a URL link just before the end of the sentence. I’m also pretty sure the period should not be part of the link (notice it was not underlined like the word ‘sentence’), but I’m not sure that that should always be the case. For example: Are there exceptions?