style: remove unnecessary function whitespace

Remove the unnecessary whitespace between the function name or the
'function' keyword and the opening parenthesis.

src/utils/cssDimensions.js

@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-export const ensureUnit = function (d) {
+export const ensureUnit = function(d) {
     if (!d) d = 0;
 
     // ensure that it is a string