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`no-unused-vars` message does not end with a period

See original GitHub issue

What version of ESLint are you using?

2.10.2

What parser (default, Babel-ESLint, etc.) are you using?

Default

Please show your full configuration:

const options = {
  // TODO: Actually set the envs correctly
  envs: ['browser', 'mocha', 'node', 'es6'],
  useEslintrc: false,
  extends: 'eslint:recommended',
  ignorePattern: [
    'node_modules',
    'bower_components',
    'build',
    'tmp',
    'dist'
  ],
  // Eventually let's enable it to fix problems automatically! :D
  // fix: true,
  rules: {
    semi: WARN,
    strict: [WARN, 'safe'],
    'no-undef': ERROR,
    'wrap-iife': WARN,
    'no-trailing-spaces': WARN,
    'comma-style': [WARN, 'last'],
    'new-parens': WARN,
    'no-inline-comments': WARN,
    'no-sequences': ERROR,
    'no-alert': WARN,
    'no-caller': WARN,
    'no-lone-blocks': WARN,
    'object-curly-spacing': [WARN, 'never'],
    'space-infix-ops': WARN,
    'space-unary-ops': [WARN, {words: true, nonwords: false}],
    'spaced-comment': [WARN, 'always'],
    'no-unused-vars': [WARN, {argsIgnorePattern: '^_'}]
  }
};

What did you do? Please include the actual source code causing the issue.

I linted code and got back a message without a period.

const cli = new eslint.CLIEngine(eslintOptions);

function lint(req, res) {
  if ('paths' in req.body) {
    const report = cli.executeOnFiles(req.body.paths);
    if (eslintOptions.fix) {
      eslint.CLIEngine.outputFixes(report);
    }
    res.json(report);
  } else {
    res.status(S.BAD_REQUEST).json({
      error: 'Missing parameter "path"'
    });
  }
}

What did you expect to happen?

I expected the message from the no-unused-vars rule to include a period at the end, like the other messages from ESLint.

What actually happened? Please include the actual, raw output from ESLint.

https://gist.github.com/wavebeem/98136a4d2823a43716e76651571473a6