Add support for sub-expressions

[Accurate Archer]

This is the best vscode Handlebars formatted that I have found (and I have tried many). Thank you.

Currently, it will reformat this:

<li>
  <a {{#if (equals pageLink "/users" ) }} class="is-active" {{/if}} href="/users">
     Users
  </a>
</li>

to:

<li>
  <a {{#if (equals pageLink"/users" ) }} class="is-active" {{/if}} href="/users">
     Users
  </a>
</li>

removing the space between the pageLink variable and the "/user" literal.

[Accurate Archer]

The issue seems to happen with double-quoted string literals only. The following snippets work:

<li>
  <a {{#if (equals pageLink 42 ) }} class="is-active" {{/if}} href="/users">
     Users
  </a>
</li>

and:

<li>
  <a {{#if (equals pageLink anotherVariable ) }} class="is-active" {{/if}} href="/users">
     Users
  </a>
</li>

and surprisingly this too:

<li>
  <a {{#if (equals pageLink 'single-quote' ) }} class="is-active" {{/if}} href="/users">
     Users
  </a>
</li>

[Mohamed Akram]

Sorry about that. This is fixed in v0.0.5.