Ensure matching if - else attributes

[MeirionHughes]

<div if.bind="user.signedIn">
  Hello ${user.name}.
  <a>Logout</a>
</div>
<div else>
  Please log in.
</div>

• for element with else attribute:
  • ensure immediate preceding sibling node (same parent), ignoring text-nodes, has an if.bind

example

<div>
  <div else>
    Please log in.
  </div>
</div>

• issue: missing a matching if.bind in predecessor sibling

ref: https://github.com/jods4/if-else cc: @jods4

[jods4]

predecessor-sibling

Should be not any predecessor, but the previous element.