message: src/util exec cleanup
diff: @@ -23,22 +23,14 @@ import * as parse5 from 'parse5';
  import * as path from 'path';
  import {Analysis} from 'polymer-analyzer';
  -const {execFile: _execFile} = require('child_process');
  +import { ConvertedDocumentFilePath } from './urls/types';
  +
  import _mkdirp = require('mkdirp');
  import _rimraf = require('rimraf');
  const {promisify} = require('util');
  +const {execFile: _execFile} = require('child_process');
  +const execFile = promisify(_execFile);
  -import {ConvertedDocumentFilePath} from './urls/types';
  -
  -export interface ExecResult {
  - stdout: string;
  - stderr: string;
  -}
  -
  -/**
  - * Helper promisified "execFile" library function.
  - */
  -export const execFile = promisify(_execFile);
  /**
  * Helper promisified "mkdirp" library function.
  @@ -275,6 +267,14 @@ export async function writeFileResults(
  }));
  }
  +/**
  + * The exec() helper return type.
  + */
  +export interface ExecResult {
  + stdout: string;
  + stderr: string;
  +}
  +
  /**
  * A helper function for working with Node's core execFile() method.
  */
  