Add back in second line of comment (#7718)
Add back in second line of comment (#7718)

The second line of this comment was removed in the previous commit due to the usage of process.browser.
This meant the comment was incomplete and confusing
https://github.com/zeit/next.js/commit/c03e94bebddff570e2181bf3b8c34adf0c704470#diff-a15b49cbb3a523d81a74e0fab7f08eb5
JeromeFitz/next.js,zeit/next.js,flybayer/next.js,azukaru/next.js,zeit/next.js,BlancheXu/test,JeromeFitz/next.js,JeromeFitz/next.js,BlancheXu/test,azukaru/next.js,flybayer/next.js,flybayer/next.js,zeit/next.js,azukaru/next.js,JeromeFitz/next.js,BlancheXu/test,azukaru/next.js,flybayer/next.js