HTML

More than 2 attributes should be broken out into individual lines and alphabetically sorted, otherwise it should be one line, unless it goes beyond 80 characters from the wall.

Bad

<div this="this" that="that" />

Good

<div
  that="that"
  this="this"
/>

Bad

<div
  this="this"
/>

Good

<div this="this" />

Bad

<div this="this that this that this that this that this that this that this that" />

Good

<div
  this="this that this that this that this that this that this that this that"
/>