Improve spacing in polyfill error messages

[kashav]

Noticed a lack of spacing in the following error message:

In this environment the sources for assign MUST be an object.This error is a performance optimization and not spec compliant.
TypeError: In this environment the sources for assign MUST be an object.This error is a performance optimization and not spec compliant.
    at Object.assign (http://localhost:8081/index.android.bundle?platform=android&dev=true&hot=false&minify=false:230:15)
    at http://localhost:8081/index.android.bundle?platform=android&dev=true&hot=false&minify=false:134559:46
    at Array.map (native)
    at GridComponent._callee$ (http://localhost:8081/index.android.bundle?platform=android&dev=true&hot=false&minify=false:134554:58)
    at tryCatch (http://localhost:8081/index.android.bundle?platform=android&dev=true&hot=false&minify=false:7388:40)
    at Generator.invoke [as _invoke] (http://localhost:8081/index.android.bundle?platform=android&dev=true&hot=false&minify=false:7576:22)
    at Generator.prototype.(anonymous function) [as next] (http://localhost:8081/index.android.bundle?platform=android&dev=true&hot=false&minify=false:7413:21)
    at tryCatch (http://localhost:8081/index.android.bundle?platform=android&dev=true&hot=false&minify=false:7388:40)
    at invoke (http://localhost:8081/index.android.bundle?platform=android&dev=true&hot=false&minify=false:7446:20)
    at http://localhost:8081/index.android.bundle?platform=android&dev=true&hot=false&minify=false:7476:11

Tested by updating the message locally in /path/to/rn-project/node_modules/react-native/packager/src/Resolver/polyfills/Object.es6.js.

[facebook-github-bot]

@hramos has imported this pull request. If you are a Facebook employee, you can view this diff on Phabricator.

[ide]

@facebook-github-bot shipit

[hramos]

The current status here is that it failed a snapshot test. Seems like we just need to update the snapshot test. From what I can tell, the snapshot test in question is not synced to GitHub, so we'll need to update it from a local checkout of our internal repo. Given it's a spacing change, I hope you understand this may not be treated with the highest priority.

[kashav]

@hramos, haha yeah, not too bothered by this one – thanks for the update! 😄

[facebook-github-bot]

I tried to merge this pull request into the Facebook internal repo but some checks failed. To unblock yourself please check the following: Does this pull request pass all open source tests on GitHub? If not please fix those. Does the code still apply cleanly on top of GitHub master? If not can please rebase. In all other cases this means some internal test failed, for example a part of a fb app won't work with this pull request. I've added the Import Failed label to this pull request so it is easy for someone at fb to find the pull request and check what failed. If you don't see anyone comment in a few days feel free to comment mentioning one of the core contributors to the project so they get a notification.