code: function reportRequiredEndingSpace (node, token) {
        context.report(node, token.loc.start,
          "A space is required before '" + token.value + "'")
      }
docs: Reports that there should be a space before the last token
  @param {ASTNode} node - The node to report in the event of an error.
  @param {Token} token - The token to use for the report.
  @returns {void}