code: function joinTag(editor, node, syntax) {
  	// Remove everything between the end of opening tag and the end of closing tag
  	const open = getText(editor, node.open);
  	const m = open.match(/\s*>$/);
  	const start = node.open.end.translate([0, m ? -m[0].length : 0]);
  	editor.setTextInBufferRange(new Range(start, node.end),
  		selfClosingStyle[syntax] || selfClosingStyle.xhtml);
  }
docs: Joins given tag into single, unary tag
  @param  {TextEditor} editor
  @param  {Node}       node
  @param  {String}     syntax Host document syntax, defines how self-closing tag
  should be displayed