function sanitizeText(chars) {
  var buf = [];
  var writer = htmlSanitizeWriter(buf, angular.noop);
  writer.chars(chars);
  return buf.join('');
}
@ngdoc method
@name $sanitizeProvider#enableSvg
@kind function

@description
Enables a subset of svg to be supported by the sanitizer.

<div class="alert alert-warning">
  <p>By enabling this setting without taking other precautions, you might expose your
  application to click-hijacking attacks. In these attacks, sanitized svg elements could be positioned
  outside of the containing element and be rendered over other elements on the page (e.g. a login
  link). Such behavior can then result in phishing incidents.</p>

  <p>To protect against these, explicitly setup `overflow: hidden` css rule for all potential svg
  tags within the sanitized content:</p>

  <br>

  <pre><code>
  .rootOfTheIncludedContent svg {
    overflow: hidden !important;
  }
  </code></pre>
</div>

@param {boolean=} regexp New regexp to whitelist urls with.
@returns {boolean|ng.$sanitizeProvider} Returns the currently configured value if called
   without an argument or self for chaining otherwise.