Minor: Fixed W3C validation errors

• Fixed W3C validation errors (caused by a couple of dumb mistakes on my part):
	◦ Line 90, Column 53: End tag b violates nesting rules.
	◦ Line 90, Column 58: No em element in scope but a em end tag seen.
	◦ Line 114, Column 91: An img element must have an alt attribute, except under certain conditions.