[cssom-tests] no whitespace between "!" and "important" in Declaration::AppendPropertyAndValueToString and Declaration::AppendVariableAndValueToStr, (#4444)

MozReview-Commit-ID: BKGqEpn0utp

Upstreamed from https://bugzilla.mozilla.org/show_bug.cgi?id=1315403

View on GitHub: https://github.com/w3c/web-platform-tests/pull/4444

Received on Tuesday, 3 January 2017 15:50:51 UTC