title: How would I insure NO newline in ESLint
body: <p>From ESLint:</p>
  
  <p><a href="http://eslint.org/docs/rules/eol-last.html" rel="nofollow">http://eslint.org/docs/rules/eol-last.html</a></p>
  
  <p>You can disable a check verifying that each file has a newline trailing. However, there does not appear to be an equal/opposite rule. How would I insure that my files have no newline at the end using ESLint? Is this possible?</p>