Only allow one blank line between blocks and at EOF

Currently, the style.js enforces at most two lines:

// disallow multiple empty lines
'no-multiple-empty-lines': [2, {'max': 2}],

Should this follow this suggestion to enforce the max blank line to only 1?

Besides, this will affect the allowed blank line at the end of the file, too.

[paulintrognon]

@dsernst You’re right! I had an outdated eslint version installed globally. I removed it and got rid of the error. Thank you very much!

[dsernst]

@paulintrognon: If I remember correctly, there was a problem with my editor using globally installed package versions that were very out-of-date. I believe nvm was also making the issue worse by obfuscating my global npm installs.

Once I removed all the old versions that were globally installed, both within nvm node-version-specific directories and outside, the issue went away.

Hope this helps.